The Fast Bowler Who Is Growing Too Fast to Load

His BMI is 49 ÷ (1.66 × 1.66) = 17.8 kg/m². That number alone cannot label him thin or overweight: at 14 years, BMI must be read against age- and sex-specific percentile charts (WHO 5–19 years or IAP charts), not adult cut-offs. A boy in the middle of a growth spurt often looks lean because height is gained before muscle and fat.

The pattern described - 8 cm height gain in 11 months, two shoe sizes, voice change, acne - fits the adolescent growth spurt. In boys, peak height velocity usually occurs between about 12 and 15 years, and growth of the extremities precedes trunk growth, which is why the shoe size changes first.

Before replying to the father I would:

• plot height and weight on a growth chart and calculate height velocity;
• ask about appetite, a three-day diet record, sleep hours, chronic illness, worm infestation and any weight loss or fatigue;
• measure mid-upper arm circumference and look for pallor;
• ask about the family's height pattern and the timing of the father's own growth spurt;
• check deworming and immunisation status.

Referral is needed if he is crossing centile lines downward, has symptoms, or has gained no weight in 3–6 months. Otherwise, the priority is reassurance plus food and sleep, not a supplement.

The pain just below the kneecap in a 14-year-old fast bowler, worse after bowling and with next-morning swelling, most likely represents Osgood–Schlatter disease - traction apophysitis of the tibial tuberosity at the insertion of the patellar tendon - or early patellar tendinopathy. At this age the growth plate is open, so repeated jumping and heavy axial loading are poorly tolerated.

The proposed programme is inappropriate in its present form: 40 kg barbell squats plus 100 bounding jumps per session, three times a week, is a large jump in load for an untrained boy with symptoms. Bounding is a plyometric exercise and should not be added while the knee is painful.

For eight weeks I would recommend:

• relative rest: stop bowling and bounding until he is pain-free in daily activity, then reintroduce gradually;
• pain-free strengthening: isometric quadriceps holds, straight-leg raises, glute bridges, calf raises, 2–3 sets, alternate days;
• flexibility for quadriceps, hamstrings and calf, plus hip and core control;
• supervised resistance training with body weight or light load, emphasising technique and full range, not maximal loads;
• a 24-hour pain rule: if pain or swelling is worse the next day, the load was too high;
• medical review if he limps, has night pain, or does not improve in 4–6 weeks.

Resistance training is safe and useful in adolescence, but it must be progressive and supervised, not a 'no pain, no gain' programme.

I would tell the father that the boy does not need to be taken off games altogether; modified activity and relative rest for the knee are better than total withdrawal, which would affect fitness, confidence and social contact.

On the supplement, food first. A 49 kg boy needs roughly 1.2–1.5 g of protein per kg per day, i.e. about 59–74 g, easily obtained from dal, rajma, milk, curd, paneer, eggs, groundnuts and roti. His calcium requirement is about 1,300 mg/day, and iron-rich foods with vitamin C are important. A daily surplus of 300–500 kcal - an extra roti, a glass of milk, a handful of groundnuts, fruit - will support growth without excess fat gain.

Commercial weight-gain powders are expensive, poorly regulated and may contain large amounts of sugar or, occasionally, prohibited substances. They do not replace meals. I would also stress 8–9 hours of sleep.

Review his weight monthly on the growth chart. If he still fails to gain weight after 2–3 months of good food and sleep, or has fatigue, poor appetite or bowel symptoms, refer him for medical assessment rather than buying another product.