OrthopaedicsDr. Rakesh MahajanJoint Pain in Younger Population

Vice Chairman and Head of Department, Orthopaedics, BLK-Max Super Speciality Hospital, New Delhi, India

Part 8 of 9 in Joint Pain in the Younger Population: Causes, Prevention and Modern Treatments

The Weight Training Debate: What Sports Medicine Says About Building Muscle Safely

May 3, 2026

Asked directly whether social-media fitness advice on weight training holds up, Dr. Mahajan's answer was not a flat no: properly progressed strength training in younger years does directly help maintain bone strength into old age. The problem is execution. He regularly sees young patients who damaged their elbows and shoulders on a gym instructor's encouragement to push past their capacity: people with a BMI of 20 attempting to lift 40 to 50 kilograms from the outset. His fix is Young's modulus, stated plainly: stress beyond a tendon or muscle's elastic limit causes it to fail, so progression has to be graded, and gym instructors need proper training to prescribe safely.

The same caution applies to protein supplementation, where influencer advice commonly pushes 2 g/kg of body weight against a clinical recommendation of 0.8 to 1.5 g/kg. Overuse risks real kidney damage, and commercial protein products carry a documented risk of anabolic steroid contamination. Dr. Mahajan's practical fix is the same as for training load: route patients to a dietitian or nutritionist for dosing guided by body weight and activity level, and push for more young doctors to be active and credible on the same social platforms where the misinformation originates.

This guide is based on a live Jivo Masterclass — Dr. Rakesh Mahajan taught doctors across Africa on May 3, 2026.

FROM THE LIVE Q&A

DR

Dr. Steven Kopay, Cameroon (general surgeon)

Is there an age limit for using PRP injections for joint pain?

RM

Dr. Rakesh Mahajan

No, there is no age limit — it can be given from young patients up to the 60s or 70s without a problem. The only practical consideration is the blood volume required: around 14 to 15 ml for PRP and 10 ml for GFC.

See all 9 questions from this masterclass →

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Frequently Asked Questions

Can PRP and steroid injections be used concurrently?

No. Steroid is given for active pain and inflammation, early in the treatment pathway. Regenerative therapies like PRP are used once the condition is confirmed chronic with no active inflammation. Combining them is counterproductive, since steroid's anti-inflammatory effect can work against the regenerative signal from the growth factors.

A 35-year-old male patient presented with bilateral shoulder pain of 6 months' duration, worsening over the past month with limited range of movement. How would you work this up?

First rule out diabetes and thyroid disease, which account for around 30% of bilateral shoulder presentations in practice, then check for manual/overhead work. If negative, get a plain X-ray to rule out joint space narrowing and calcific tendinopathy, then trial physiotherapy (ultrasonic therapy, TENS, shoulder exercises) with a 3-week NSAID course. In this case, rheumatoid factor came back positive with MRI showing bilateral partial-thickness supraspinatus tears and subacromial bursitis — so the approach became NSAIDs, DMARDs for the underlying rheumatoid disease, a triamcinolone injection into the subacromial bursa, and physiotherapy. A repeat steroid injection should not be given before 3 months. If there is still no response, proceed to shoulder arthroscopy to debride the bursa, assess the AC joint and address the tendon tears directly.

Must all cases start with medical treatment before progressing to regenerative therapies?

Yes. Chronicity is labelled at 3 months, with 6 to 12 weeks as the clinical boundary. A patient should start with NSAIDs, not regenerative therapy. Only if steroid injection has also failed to control the inflammation between 6 and 12 weeks should regenerative therapy be considered, and 3 months is the ideal timing.

How is PRP prepared?

Around 10 to 14 ml of blood is drawn from the patient into a kit-supplied vial containing heparin, then centrifuged to separate the platelet-rich plasma from the rest of the blood. This typically yields about 5 ml of PRP solution, which is injected as multiple pricks around the tendon or ligament rather than as a single injection, to achieve the best results.

How does PRP promote healing at the cellular level, and what growth factors such as PDGF and TGF-beta are involved?

Platelets contain multiple growth factors, including PDGF and TGF-beta, that promote healing through two mechanisms: increasing vascularisation of the target tissue and stimulating cellular regeneration. One group of factors increases local blood supply, while another increases cellular activity — together they drive ligament, tendon and articular cartilage repair.

Does weight training actually help build long-term bone density?

Yes, but only when properly progressed. Correctly executed strength training in younger years does directly help maintain bone strength into old age.

What is Young's modulus, and why is it used to explain gym injuries?

It describes how stress beyond a tendon or muscle's elastic limit causes it to fail, which is why progression has to be graded rather than pushed past a person's true capacity, and why gym instructors need proper training to prescribe safely.

How much protein supplementation is too much for muscle building?

Influencer advice commonly pushes 2 g/kg of body weight against a clinical recommendation of 0.8 to 1.5 g/kg, and overuse risks real kidney damage.

Are commercial protein supplements safe to use without professional guidance?

Commercial protein products carry a documented risk of anabolic steroid contamination, so dosing should be guided by a dietitian or nutritionist based on body weight and activity level.

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