Novak Djokovic proactive care performance: The science of defying age

Elite performance in your late 30s is achievable when you proactively manage the predictable physiology of aging. Testosterone falls gradually with age, aerobic capacity declines faster with each passing decade, and strength is lost faster than muscle mass. Consistent strength work, endurance training, and recovery keep function higher along that curve and help prevent the injuries that force a reset. Djokovic is a high-profile example of this “prevent the breakdown” model, and the same principles can be scaled to everyday life.

Key takeaways

• Elite performance in the late 30s comes from managing predictable aging physiology, not escaping it. Total testosterone falls gradually with age, aerobic capacity declines faster with each decade, and strength is lost faster than muscle mass. Training does not stop these changes, but it keeps function higher as they happen.
• Progressive resistance training improves strength in adults over 50, with pooled gains of about 24 to 33 percent and larger gains from higher-intensity training. This makes heavy, consistent strength work a primary way to preserve power and change-of-direction ability with age.
• Endurance training, including interval sessions on top of an aerobic base, raises aerobic capacity and muscle mitochondrial function in older as well as younger adults, although VO₂ max still declines with age.
• Hypogonadism requires both persistent symptoms and low testosterone confirmed on repeat morning testing. Testing should include LH and FSH to separate primary from secondary causes, and free testosterone when total testosterone is borderline. Testosterone therapy suppresses sperm production and is not appropriate for men who are trying to conceive.
• A practical proactive care plan starts with a baseline physical and appropriate labs. Then train with 2 to 4 strength days, 2 to 3 steady aerobic days plus 1 to 2 interval sessions, 10 to 15 minutes of near-daily mobility or prehab, and 7 to 9 hours of consistent sleep.

The relationship

Training, recovery, and medical monitoring cannot stop age-related changes in testosterone, aerobic capacity, and muscle, but they can keep function higher while those changes happen. Novak Djokovic, at 38, still moves with the footwork and decision speed of a much younger player. That reflects years of proactive care spent managing his body rather than waiting for it to break down.

Biological age describes how your organs and cells behave, which can differ from your age in years. The same physiology applies to men in their 30s, 40s, and 50s whose goal is staying strong for work, family, and weekend sports.

In the Baltimore Longitudinal Study of Aging, a 2001 analysis of 890 men in The Journal of Clinical Endocrinology and Metabolism found that total testosterone fell by an average of 0.124 nmol/L (about 3.6 ng/dL) per year, independent of illness and medication use.^[1] By total testosterone criteria, about 20 percent of men over 60, 30 percent over 70, and 50 percent over 80 had levels in the hypogonadal range.^[1] A 2005 study in Circulation from the same cohort found that peak VO₂, the maximum amount of oxygen the body can use during intense exercise, declines in every decade of adult life.^[2] The rate accelerates from 3 to 6 percent per 10 years in the 20s and 30s to more than 20 percent per 10 years in the 70s, and the acceleration is especially marked in men.^[2] A 2012 quantitative review in Frontiers in Physiology reported a median muscle loss of about 0.5 percent per year in men across cross-sectional studies.^[3] Longitudinal studies show a loss of about 0.8 to 1 percent per year by age 75, and strength is lost 2 to 5 times faster than mass.^[3] Training raises the level of function at which these changes take place. Resistance training increases strength in adults over 50,^[4] interval training increases aerobic capacity in older as well as younger adults,^[5] and the records of master athletes show that even highly trained people decline with age, but gradually.^[6]

A 2017 review in The Journal of Physiology notes that because master athletes are highly trained, their world records reflect aging itself, without the added effects of inactivity.^[6] Those records fall in an essentially linear way until around the eighth decade, after which the decline speeds up.^[6] Djokovic is a well-known example of the same pattern: an athlete who has extended a career by managing that decline rather than ignoring it.

How it works

Hormones: the gradual testosterone decline

Testosterone supports muscle, bone density, red blood cell production, libido, and drive. In the Baltimore Longitudinal Study of Aging, total testosterone declined with age regardless of health status.^[1] Men with a higher body mass index had lower total testosterone, but they did not have a lower free testosterone index.^[1] Male hypogonadism is a clinical diagnosis, not a lab result. According to the 2018 AUA guideline, it requires symptoms or signs together with low testosterone confirmed on two early-morning measurements.^[7] High LH with low testosterone suggests primary hypogonadism, in which the testes are not responding. Low or normal LH with low testosterone suggests secondary or functional hypogonadism.

The AUA guideline also recommends measuring LH in men with low testosterone, which is how primary and secondary causes are told apart.^[7] The 2018 Endocrine Society guideline recommends measuring free testosterone when total testosterone is near the lower limit of normal or when SHBG may be abnormal.^[8] Free testosterone can be measured by equilibrium dialysis or calculated from total testosterone, SHBG, and albumin.^[8] In practice, repeat morning testing means a blood draw between 7 and 11 a.m. that includes total testosterone, free testosterone, LH, and FSH. Testosterone therapy suppresses sperm production, so the AUA guideline advises against it for men who are trying to conceive.^[7]

A 2013 meta-analysis in the European Journal of Endocrinology found that weight loss raised total testosterone in men with obesity.^[9] The average gain was about 2.9 nmol/L with a low-calorie diet and 8.7 nmol/L after bariatric surgery, and men who lost more weight had larger rises.^[9] Lifestyle changes do not stop aging, but they can remove some of the factors that push testosterone lower.

Muscle and strength: resisting sarcopenia

Sarcopenia is the age-related loss of muscle mass and strength. According to the Frontiers in Physiology review, men lose strength at about 3 to 4 percent per year by age 75, which is faster than they lose muscle.^[3]

A 2010 meta-analysis in Ageing Research Reviews pooled 47 studies with 1,079 participants aged 50 and older.^[4] Resistance training increased strength by about 24 to 33 percent, depending on the exercise tested, and higher-intensity training produced larger gains.^[4] For men in their 30s and 40s, heavy strength work is less about size and more about keeping the strength and power needed for sprinting, cutting, and changing direction.

Endurance and VO₂ max

VO₂ max is the highest rate at which the body can take up and use oxygen during hard exercise. In the Baltimore cohort, peak VO₂ declined at similar rates across all levels of self-reported leisure-time activity, so activity level did not change the slope of decline in that study.^[2] Training changes the level from which that decline starts. In a 2017 randomized trial in Cell Metabolism, 12 weeks of high-intensity interval training increased peak aerobic capacity in adults aged 65 to 80 as well as in adults aged 18 to 30.^[5]

Recovery systems: mitochondria, inflammation, and sleep

Mitochondria are the structures inside cells that turn food and oxygen into usable energy. In the same 2017 trial, interval training increased skeletal muscle mitochondrial respiratory capacity in both younger and older adults.^[5] A 2005 systematic review in the Journal of the American College of Cardiology found that a single exercise session causes a short-term inflammatory response.^[10] Over the long term, regular training is associated with lower C-reactive protein and other inflammatory markers.^[10]

Sleep affects hormones directly. In a small 2011 study in JAMA, ten healthy young men who slept five hours a night for one week had daytime testosterone levels 10 to 15 percent lower than after normal sleep.^[11]

Mobility and injury risk: treating your joints as a long-term project

With age, tendons become stiffer and slower to recover from heavy loading, and cartilage tolerates sudden load spikes less well. That makes abrupt jumps in training, or “weekend warrior” patterns, more likely to cause tendon pain, muscle strains, and joint pain. Regular mobility work, eccentric strength training for tendons, and gradual increases in load are reasonable ways to lower that risk and keep movement quality high. Djokovic’s long warm-ups, mobility drills, and constant physiotherapy are an elite version of the same approach.

Conditions linked to it

Several age-related conditions affect performance, and training and recovery habits influence most of them.

Sarcopenia and dynapenia. Dynapenia is the age-related loss of strength and power, which can follow a different course from the loss of muscle mass. The Frontiers in Physiology review found that loss of strength is a more consistent risk factor for disability and death than loss of muscle mass.^[3] In sport, it shows up as slower sprinting, jumping, and changes of direction.

Functional hypogonadism. Functional hypogonadism means testosterone is low because of potentially reversible factors such as obesity, sleep apnea, chronic illness, or medications, rather than damage to the testes or pituitary. Confirmation follows the same steps: persistent symptoms plus repeat morning total and free testosterone, LH, and FSH. In men with obesity, weight loss raises both testosterone and gonadotropins, which fits with a hormonal axis that is suppressed but intact.^[9] Symptoms can include low libido, erectile changes, fatigue, poor recovery, and more body fat. Lifestyle change is the foundation, though the testosterone gain from diet alone is modest. Treatments that stimulate the body’s own LH and testosterone production, such as enclomiphene, have been studied in men with secondary hypogonadism.

Metabolic and cardiovascular risk. Lower muscle mass, less activity, and more visceral fat push men toward metabolic syndrome and type 2 diabetes. Under the 2009 harmonized definition published in Circulation, metabolic syndrome is diagnosed when three of five risk factors are present: raised blood pressure, raised triglycerides, low HDL cholesterol, raised fasting glucose, and central obesity.^[12] A 2013 meta-analysis of 93 trials in the Journal of the American Heart Association found that endurance training lowered systolic blood pressure by about 3.5 mm Hg on average and by about 8.3 mm Hg in people with hypertension.^[13] Dynamic resistance training also lowered blood pressure.^[13]

Overuse injuries and joint degeneration. Aging athletes who skip strength and mobility work appear more prone to tendon problems, stress injuries, and joint pain. These injuries can end training before age itself would.

Limitations. Much of the master-athlete evidence, including the world-record analysis described earlier, is observational.^[6] It cannot show that training alone prevents these conditions. Genetics, nutrition, and medical care also matter.

Symptoms and signals

Signals worth watching for in your 30s, 40s, and beyond:

• Strength you once had is fading, even though you are still training
• Explosive power (jumps, sprints, or quick changes of direction) feels slower or “heavy”
• Workouts that used to cause one day of soreness now leave you sore for three or four days
• New or recurring joint pain in knees, hips, shoulders, or elbows, especially after sport
• More frequent muscle strains or tendon flare-ups with only modest increases in training
• Gaining belly fat while eating about the same amount of food
• Morning erections becoming less frequent or less firm, which can reflect vascular or hormonal changes
• Daytime fatigue, brain fog, or needing more caffeine to get through normal days
• Poor or fragmented sleep, especially waking up unrefreshed even after 7 to 8 hours in bed
• Drop in competitive drive or enjoyment of your sport, even when life stress is not higher than usual

What to do about it

A Djokovic-style proactive care plan does not require a professional’s budget or schedule, but it does need structure.

1. Get a baseline: test, don’t guess.
   • Schedule a full physical, especially if you are over 35 or have been mostly sedentary and want to increase training.
   • If you have symptoms that could reflect low testosterone, the 2018 AUA guideline recommends two early-morning total testosterone measurements, LH in men with low testosterone, and prolactin when LH is low or normal.^[7] Hemoglobin or hematocrit, and PSA in men over 40, are checked before any testosterone therapy.^[7] Free testosterone and FSH help when total testosterone is borderline or the cause is unclear.^[8]
   • Consider a simple performance screen: push-ups to fatigue, grip strength, a body-weight squat test, and a brisk walk or jog test.
   • If you have a strong family history of heart disease or any concerning symptoms, ask your doctor whether an ECG or further cardiac evaluation makes sense before high-intensity training.
2. Build your proactive care routine.
   • Strength training. Lift two to four days per week, prioritizing compound moves such as squats, deadlifts, presses, rows, and loaded carries. Work mostly in the 6 to 12 rep range with progressive overload. In the meta-analysis of older adults, higher-intensity training produced larger strength gains.^[4]
   • Cardio structure. Combine two to three days per week of steady “zone 2” work, where you can still talk in short sentences, with one to two short interval sessions. Interval training increased aerobic capacity in both younger and older adults in a randomized trial.^[5]
   • Mobility and prehab. Spend 10 to 15 minutes most days on hip, ankle, and thoracic spine mobility plus shoulder and hamstring work. Add eccentric exercises for common problem areas like the Achilles, patellar tendon, and elbow flexors to protect against overuse.
   • Sleep and stress. Aim for 7 to 9 hours of quality sleep with consistent bed and wake times. Dark, cool, quiet rooms and a wind-down routine matter as much as hours in bed.
   • Nutrition. A 2018 meta-analysis in the British Journal of Sports Medicine found that protein supplementation during resistance training increased gains in strength and muscle.^[14] Total intakes above about 1.6 grams per kilogram of body weight per day added no further gain in fat-free mass, and the benefit was smaller with increasing age.^[14] Eat enough total calories and carbohydrates to support training and recovery.
   • Body composition. Aim to keep waist circumference below the central-obesity cutoffs used in metabolic syndrome criteria (102 cm, about 40 inches, for men under the U.S. cut point).^[12] Obesity is associated with lower testosterone, and losing weight raises it.^[9]
   • Medical therapies when needed. If symptoms of low testosterone persist, confirm with repeat morning testing that includes LH and FSH, because the LH result separates primary from secondary hypogonadism and shapes treatment. Testosterone therapy suppresses sperm production, and the AUA guideline advises against it for men trying to conceive.^[7] Options that preserve the body’s own production, such as enclomiphene, may suit some men with secondary hypogonadism.
3. Monitor, adjust, and protect the long game.
   • Men on testosterone therapy need follow-up testing. The AUA guideline recommends a follow-up testosterone level after starting therapy to confirm the target range has been reached, along with ongoing monitoring of hematocrit and symptoms.^[7]
   • Track simple performance metrics: resting heart rate, how many push-ups or pull-ups you can do, your typical run or ride pace, and how long soreness lasts after similar sessions.
   • Use a training log to note sleep, energy, and stress. If soreness and fatigue are climbing while performance falls, you need more recovery, not more volume.
   • Plan deload weeks every 6 to 8 weeks where you reduce total volume by 30 to 50 percent to let joints and tendons recover.

Veedma offers testing that includes total and free testosterone measured by LC-MS/MS with LH and FSH, or a review of labs you already have, with results assessed by licensed providers. When appropriate, treatment is enclomiphene or the enclomiphene plus tadalafil tablet. Enclomiphene is not an FDA-approved drug; it is prescribed after a provider confirms the diagnosis and is compounded by a licensed U.S. pharmacy.

Myth vs fact

Myth: After 35, performance always falls off a cliff.

Fact: World records set by master athletes show a gradual, roughly linear decline with age until about the eighth decade, not a cliff at 35.^[6]

Myth: More training is always better for staying young.

Fact: Performance improves with a balance of stress and recovery. Chronic under-recovery without enough sleep and planned lighter weeks raises injury risk and can stall progress.

Myth: Testosterone therapy is a shortcut to Djokovic-level performance.

Fact: According to the AUA guideline, testosterone therapy is for men with symptoms and confirmed low testosterone, and it requires monitoring for effects such as a rise in hematocrit.^[7] It does not replace training, sleep, or nutrition.

Myth: Pain is just weakness leaving the body.

Fact: Persistent joint or tendon pain is often early tissue overload. Ignoring it instead of adjusting training often leads to longer layoffs and, in some cases, surgery.

Myth: If you are not a pro, you do not need proactive care.

Fact: The same habits that keep Novak Djokovic on tour can help you keep up with your kids, stay productive at work, and enjoy sport into your 60s.

Bottom line

Novak Djokovic shows that age does not have to end high-level performance in men, and that keeping it takes deliberate work. The decline in testosterone, aerobic capacity, and strength with age is real. How much function you keep along the way depends heavily on strength training, conditioning, mobility, sleep, nutrition, and medical evaluation when symptoms suggest a problem. The same principles apply whether your goal is a tour event or staying strong for work, family, and weekend sport.

References

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2. Fleg JL, Morrell CH, Bos AG, et al. Accelerated longitudinal decline of aerobic capacity in healthy older adults. Circulation. 2005;112:674-82. PMID: 16043637
3. Mitchell WK, Williams J, Atherton P, et al. Sarcopenia, dynapenia, and the impact of advancing age on human skeletal muscle size and strength; a quantitative review. Front Physiol. 2012;3:260. PMID: 22934016
4. Peterson MD, Rhea MR, Sen A, et al. Resistance exercise for muscular strength in older adults: a meta-analysis. Ageing Res Rev. 2010;9:226-37. PMID: 20385254
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9. Corona G, Rastrelli G, Monami M, et al. Body weight loss reverts obesity-associated hypogonadotropic hypogonadism: a systematic review and meta-analysis. Eur J Endocrinol. 2013;168:829-43. PMID: 23482592
10. Kasapis C, Thompson PD. The effects of physical activity on serum C-reactive protein and inflammatory markers: a systematic review. J Am Coll Cardiol. 2005;45:1563-9. PMID: 15893167
11. Leproult R, Van Cauter E. Effect of 1 week of sleep restriction on testosterone levels in young healthy men. JAMA. 2011;305:2173-4. PMID: 21632481
12. Alberti KG, Eckel RH, Grundy SM, et al. Harmonizing the metabolic syndrome: a joint interim statement of the International Diabetes Federation Task Force on Epidemiology and Prevention; National Heart, Lung, and Blood Institute; American Heart Association; World Heart Federation; International Atherosclerosis Society; and International Association for the Study of Obesity. Circulation. 2009;120:1640-5. PMID: 19805654
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14. Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med. 2018;52:376-384. PMID: 28698222