Fit Between

You don't grow in the gym — you grow in your sleep. In this episode, we break down what's actually happening physiologically when you train, and why the real muscle-building work only starts once you put the weights down.

We cover why muscle protein synthesis stays elevated for up to 48 hours after a hard session, why sleep specifically (not just general "rest") plays such an outsized role thanks to growth hormone release during deep sleep, and what actually happens if you skip recovery and stack heavy sessions back to back - spoiler: it's not extra gains, it's a fast track to overtraining and injury.

We also touch on something most people never connect to their training: diet. Specifically, how a diet high in ultra-processed food can quietly undermine the very sleep you need to recover, through nutrient deficiencies that disrupt melatonin production and blood sugar swings that mess with hormone signalling overnight.

If you've ever wondered why two people can train identically hard and get completely different results, this episode is the missing piece.

Walk into any supermarket and protein is everywhere: high-protein yoghurt, high-protein cereal bars, even high-protein beer. The message is that you need more of it and the more the better. But what does protein actually do, how much do you really need, and why has the ultra-processed food industry suddenly fallen in love with it?

Laz explains what protein is beyond muscle, turns "grams per kilogram" into what it looks like on a plate, and why the extra doesn't just get stored as muscle. Lahiru asks the questions everyone's thinking: does the fat that comes with it matter, what if you're eating more plant-based, and does it matter when you eat it? Along the way: why protein has had a clean run while fat and carbs took turns as the villain, whether a protein bar is better than a KitKat, and why "high protein" on a label should make you more suspicious, not less.

This week's challenge: pick one or two whole-food protein sources and batch-cook it.

Move Mindfully. Rest Intentionally. Eat Real Food.

Growing up in Sri Lanka, Arnold Schwarzenegger was the blueprint -muscle meant vanity.

Two decades of lifting weights and one medical degree later, we know better: muscle is a modifiable organ, and what it does for your body, your brain, and your future is what really matters.

We talk sarcopenia, the crooked nail applied to muscular imbalance, why South Asians in particular are at risk, and how we each actually fit strength training into wildly different, chaotic lives.

Move. Rest. Eat.

Two brothers, one shed, and the honest story of why we started Fit Between. We talk shift work vs. structure, the crooked nail theory of movement, and set our first challenge - squats before brushing your teeth.