Plain water answers the volume side. It doesn't answer the salt side, the magnesium side, or the muscle-repair side. A numbered guide to what a heated practice is actually asking for.
A litre of sweat carries between five hundred and fifteen hundred milligrams of sodium with it, plus potassium and a smaller fraction of calcium. A sixty-minute heated class will commonly produce a litre to a litre-and-a-half of sweat in a 60kg woman. The salt comes out whether or not you notice.
Replacing the lost volume with plain water alone produces a mild functional dilution. This is the third-quarter lightheadedness, the post-class headache, the steady creep of a wired-but-tired feeling later that day. The published Bikram-yoga study found the sweat loss is primarily volume-and-sodium depletion in roughly proportional amounts — the exact case for which a balanced electrolyte is indicated.
Alrefai et al. · Physiological Reports · 2020Magnesium is the under-discussed electrolyte in heated training. It is critical for muscle relaxation, nerve conduction, and sleep onset. A heated sixty-minute session can dump enough magnesium through sweat to produce the subtle "twitchy legs at bedtime" feeling and the sense of half-broken sleep that some women describe after a heated week.
Most over-the-counter sports drinks don't replace it — they are sodium-heavy and skip the magnesium fraction entirely. A clean studio hydrator should carry a balanced mineral profile: sodium, potassium, magnesium, calcium. Not just salt.
Long isometric holds in a hot yoga sequence and eccentric tempo on a heated reformer both produce micro-damage in the working muscle fibre. The body's response is to send a chemical request for amino acids — and one of those nine, leucine, acts as the master switch for the entire repair cascade.
At a particular concentration in circulation, leucine triggers muscle protein synthesis (MPS) — the molecular process by which the muscle rebuilds and adapts. The threshold, in published work on trained women, sits at roughly two grams per serve. Reach it and the cascade fires properly. Miss it and the cascade fires weakly. Most BCAA or "amino" products on the SA shelf are dosed below this threshold — typically 1 to 1.5g of leucine per serve, which gives you a partial firing of the system you were trying to engage.
Bare Aminos is dosed at exactly 2g of leucine per serve — over the threshold, deliberately.
Moore et al. · American Journal of Clinical Nutrition · 2009BCAAs — branched-chain amino acids — were the supplement industry's recovery story for two decades. They consist of three amino acids: leucine, isoleucine, and valine. They are essential. They are useful. They are also only one third of the answer.
Muscle protein synthesis requires all nine essential amino acids to run efficiently. If the body has leucine, isoleucine, and valine present but is short on lysine, methionine, threonine, phenylalanine, tryptophan, or histidine, the assembly line stalls at the missing piece. You get an incomplete repair.
Whey protein delivers all nine — but with 120 calories, lactose, and a thickness that doesn't suit a body that just spent sixty minutes in a thirty-seven-degree room. The clean answer is the same nine essentials, isolated, fermented from plant sources, dosed for the practice rather than for a hypertrophy programme. That is what a clean-label EAA is.
Wolfe · Journal of the International Society of Sports Nutrition · 2017There is a window. It is not religious — the muscle doesn't become unsalvageable at the sixty-first minute. But the repair signal is at its loudest in the first hour after a training stimulus, and the substrate the muscle has available in that window will determine how much of the signal gets answered.
Practically: a glass of cold water with 5g of EAAs dissolved in it, taken while you walk back to the car or while you change at the studio, lands precisely where the repair cascade is asking. This is not a hard rule — EAAs at any point in the day still do their job — but the post-class hour is the highest-value placement, and the easiest single behavioural change to install.
The dose-response curve is not linear either. There is a threshold below which the cascade fires weakly, and a ceiling above which additional protein delivers no further benefit. Five grams of essentials with two grams of leucine sits over the line and well under the ceiling — sized for a 62kg woman whose practice asks for repair rather than mass, and a hundred calories lighter than the dairy alternative.
Witard et al. · Nutrients · 2014Bare Aminos answers the recovery side of the equation. 5g of essential amino acids. 2g of leucine. All nine essentials. Vegan. Plant-fermented. Sized for the practice, dosed for the body, designed for the sixty-minute window after a heated class.
See Bare Aminos for the heated room → Or go straight to the product