Night-Shift Rugby Player Who Wants to Gain Lean Mass
A 27-year-old man, 178 cm and 82 kg, plays competitive rugby and lifts four days per week. He wants to add 3 kg of lean mass over 12 weeks. He works three 12-hour night shifts per week and typically eats two large meals: one around 4 p.m. before training and one at 2 a.m. after his shift, totaling roughly 1,900 kcal and 95 g of protein. He reports bloating and cramping when he drinks a whey shake 20 minutes before lifting, ravenous hunger at 3 a.m., and 'no appetite at all' at 7 a.m. after nights. He has no diagnosed gastrointestinal disease, takes no medications, and has not previously worked with a coach.
1. Evaluate his current intake against his stated goal. Show the arithmetic and identify the specific gaps.
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Protein: for hypertrophy the working range is about 1.6–2.2 g/kg/day, which for 82 kg is 131–180 g. At 95 g he sits at roughly 1.16 g/kg, below the range, and it is concentrated in two meals, so the per-meal dose is high but the daily total is short.
Energy: using a Mifflin-St Jeor-style estimate, his resting metabolic rate is roughly 1,800–1,900 kcal. With a training plus shift-work activity factor of about 1.6–1.8, maintenance lands near 2,900–3,300 kcal. His reported 1,900 kcal is therefore a deficit of 1,000 kcal or more - he is trying to gain while dieting.
To gain about 0.25 kg per week he needs roughly 300–500 kcal above maintenance, roughly 3,300–3,700 kcal, with protein near the upper half of the range to support the surplus being partitioned toward lean tissue.
Interpretation: the 3 a.m. ravenous hunger and the total morning appetite loss are consistent with chronic under-fueling plus a shifted circadian rhythm, not with a need for a supplement. The gap is roughly 1,400–1,800 kcal per day, which has to be added gradually to avoid gastrointestinal distress.
2. Design the eating schedule and pre-workout strategy. How would you address the cramping with the shake?
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Anchor eating to his wake–train–sleep cycle rather than the clock, since he works three nights a week.
Structure: four to five occasions
- On waking (mid-afternoon on shift days): a full meal with 40–50 g protein.
- 1.5–2 hours before training: moderate carbohydrate, low fat, low fiber - rice, banana, yogurt, or a small sandwich.
- After training: 40 g protein plus carbohydrate.
- During or after the shift, around 2–3 a.m.: a packed meal. The 3 a.m. hunger is partly a gap created earlier in the day.
- Before sleep: something small containing protein.
The shake problem: a whey shake 20 minutes before lifting delivers a fast load into a gut that has been under-fed and is on a night-shift rhythm. Move it to 60–90 minutes before training or to post-training, reduce the volume, try a lactose-free or isolate product, and pair it with carbohydrate. Change one variable at a time on non-game days and keep a short symptom log. If cramping persists despite these adjustments, refer to a physician or registered dietitian rather than stacking supplements.
3. What would you actually implement in the first two weeks, and how would you measure success?
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Limit the first phase to two or three behaviors so a shift worker is not overwhelmed.
- Add one protein-containing meal or snack daily, starting with the post-shift meal, aiming for 25–40 g each time.
- Move the shake and trial a low-fiber, lower-volume pre-training meal.
- Pack food for shifts so the 3 a.m. decision is already made before fatigue sets in.
Monitoring: weekly average body weight (same scale, after waking and voiding), training log with energy and gastrointestinal ratings, and a photo food log for the first fortnight rather than gram weighing, which tends to collapse under shift work. Expect 0.2–0.4 kg per week; a rapid jump in the first week is glycogen and water, not muscle, and he should be told that in advance so he does not overinterpret it.
Coaching: ask what is genuinely realistic on a night-shift week and build the plan around that answer. Review at two weeks, then add energy again. If weight has not moved by weeks three to four despite documented adherence, revisit the energy estimate or refer, rather than adding supplements.