What supplement is best for muscle recovery?

Recovery is four clocks, not one: the glycogen clock and the protein synthesis clock, what sets each, and the two supplements that match them

What supplement is best for muscle recovery is a question that treats recovery as one process with one best product, and recovery is four processes on four clocks that tick at different speeds, so that any supplement is matched to one clock and sold for all four. The first clock is glycogen: a worked muscle has spent part of its stored carbohydrate and refills it over about a day on an ordinary adequate carbohydrate intake, which is the clock that decides whether tomorrow's session has fuel. It can be hurried when the next session is close, since in the hours after exhaustive exercise a muscle takes up carbohydrate fastest, and 1 to 1.2 grams of carbohydrate per kilogram of bodyweight per hour for the first few hours refills it faster than a normal meal pattern would, which matters to a lifter training twice in a day or an athlete with an evening game after a morning one and not to a lifter training tomorrow afternoon, for whom dinner and breakfast do the job. No supplement that is not a carbohydrate touches this clock, and the products sold for recovery that contain no carbohydrate are not on it. The second clock is protein synthesis: after a session the rate at which a muscle builds new protein runs elevated for a day or two, and the clock is fed by protein across the day, around 1.6 grams per kilogram of bodyweight, above which the meta-analysis finds no further gain, spread across meals that each carry enough to trigger the response. Protein powder matches this clock for the lifter whose food falls short of 1.6 and does nothing for the one who reaches it, and the one other product on the clock is creatine monohydrate, which does not feed synthesis directly but shortens the time to the next quality session by keeping the phosphocreatine system saturated, so that the next session's sets are the sets a recovered lifter does, and which carries its authorised claim for exactly that kind of performance.

Two clocks, two inputs, and the honest observation that both inputs are food before they are supplements: a lifter who eats carbohydrate across the day and reaches 1.6 grams of protein per kilogram has set both clocks without a tub, and the tubs are conveniences for the lifter who cannot, with creatine the single exception that food cannot match at a useful dose. What those two clocks do not include is soreness, which is the clock most lifters mean when they search for recovery and the one the shelf is built to sell to, and the next section explains why that clock has no supplement on it.

The soreness clock and why nothing on the shelf moves it, the nervous system clock and the one input it accepts, magnesium's honest place, the worked example, and the verdict

The third clock is soreness, the delayed-onset muscle soreness that peaks a day or two after an unaccustomed session and resolves by about three, and it is the clock the recovery shelf sells to because it is the one a lifter feels. The products on it have been tested in enough trials to be meta-analysed, and the verdict is consistent: tart cherry concentrate, curcumin, omega-3 fatty acids and antioxidant blends produce small and inconsistent reductions in rated soreness after unaccustomed exercise, with no effect on the recovery of strength large enough to change what a lifter can do in the next session, which is the only recovery outcome that matters to training. The antioxidant blends carry a cost on top, since high-dose vitamin C and E around training blunt the adaptation the soreness is a sign of. The largest protection against soreness is not a product but the repeated-bout effect: a muscle that has done a movement once is far less sore after the second and subsequent exposures, which is why the first week of a new block hurts and the fourth does not, and why the best supplement for soreness is the session that caused it, repeated. A lifter who wants less soreness has a programming question about novelty and volume rather than a shelf question, and a lifter who is sore is not unrecovered in any sense that the glycogen and protein clocks would recognise; the two run on their own schedules whether the muscle aches or not. The fourth clock is the nervous system, the readiness to produce force and coordinate a lift, which fades across a hard block and resets with sleep, and for which no capsule substitutes: the athlete sleep consensus names sleep as the recovery intervention with the largest and best-measured effect, a consolidated night restoring the reaction time, the motor consolidation and the perceived readiness that a short one removes, and a lifter asking what supplement is best for recovery who is sleeping six hours has their answer in a bedtime.

Magnesium's honest place is beside the four clocks rather than on any of them. It carries authorised claims for normal muscle function, normal protein synthesis, electrolyte balance, normal nervous system function and the reduction of tiredness and fatigue, each of which names a process one of the clocks depends on, and none of which is a recovery claim, since no such claim exists; a lifter whose diet is short of the mineral, which the national diet survey finds common in young men, takes it so that the processes the claims name are not running short, and takes it for that reason only. The worked example is that product: {FL}, 1500mg magnesium bisglycinate stated as 300mg elemental at 80% NRV, two capsules with the evening meal, carrying those claims and no recovery claim, batch tested for lead, mercury, arsenic and cadmium with the certificate on request, UK made under GMP and BRC, 180 capsules for £19.99 at 22p a day. The verdict on what supplement is best for muscle recovery is that the question has four answers because recovery has four clocks: carbohydrate for the glycogen clock, with the hurry-up dose only when the next session is near; protein to 1.6 grams per kilogram and creatine for the protein synthesis clock and the next quality session; nothing proven for the soreness clock, where the repeated-bout effect and a sensible programme do what no capsule does; and sleep for the nervous system clock, which is the clock a tired lifter is usually asking about and the one the shelf cannot sell.

What to check on the label

Questions people also ask

Which supplement is best for fast muscle recovery?

It depends on which of four clocks is meant: the glycogen clock is refilled by carbohydrate, about a day on an adequate intake and faster at 1 to 1.2g per kilogram per hour in the first hours only when the next session is within eight hours; the protein synthesis clock is fed by around 1.6g of protein per kilogram across the day, with creatine monohydrate the one product that shortens the time to the next quality session; the soreness clock has nothing proven on it, with tart cherry, curcumin, omega-3 and antioxidants small and inconsistent in the meta-analyses; and the nervous system clock resets with sleep, which no capsule replaces.

What supplements are good for muscle repair?

Repair is the protein synthesis clock, which runs elevated for a day or two after a session and is fed by protein across the day at around 1.6g per kilogram of bodyweight, above which the meta-analysis finds no further gain, spread across meals that each carry enough to trigger the response; protein powder supplies the shortfall for a lifter whose food does not reach that number and adds nothing for one who does, creatine monohydrate keeps the phosphocreatine system saturated so the next session is a quality one, and magnesium carries authorised claims for normal protein synthesis and normal muscle function, taken when the diet is short rather than as a repair product.

Does tart cherry or curcumin help muscle recovery?

For soreness, the meta-analyses find small and inconsistent reductions in rated soreness after unaccustomed exercise from tart cherry concentrate, curcumin, omega-3 and antioxidant blends, with no effect on the recovery of strength large enough to change what a lifter can do in the next session, which is the only recovery outcome that matters to training; the antioxidant blends add a cost, since high-dose vitamin C and E around training blunt the adaptation soreness is a sign of; and the largest protection against soreness is the repeated-bout effect, a muscle that has done a movement once being far less sore after the second exposure.

Do I need carbohydrate supplements for recovery?

Only when the next session is within about eight hours of the last, when a muscle takes up carbohydrate fastest in the first hours after exhaustive exercise and 1 to 1.2g per kilogram per hour refills glycogen faster than a normal meal pattern, which matters to a lifter training twice in a day or an athlete with an evening fixture after a morning one; a lifter training tomorrow afternoon refills glycogen in about a day from dinner and breakfast, and no recovery product that contains no carbohydrate is on this clock at all, whatever its label says.

Is sleep more important than supplements for recovery?

For the nervous system clock, the readiness to produce force and coordinate a lift that fades across a hard block, sleep is the only input and the athlete sleep consensus names it the recovery intervention with the largest and best-measured effect, a consolidated night restoring reaction time, motor consolidation and perceived readiness that a short one removes; a lifter sleeping six hours who asks what supplement is best for recovery has their answer in a bedtime, and the glycogen and protein clocks are set by food, so the whole of recovery is nearly free and the shelf sells the one clock, soreness, that nothing on it moves.

Sources

1. The glycogen resynthesis literature: muscle glycogen is restored over about 24 hours on an adequate carbohydrate intake, faster with 1 to 1.2g of carbohydrate per kilogram per hour in the hours after exhaustive exercise when the next session is within eight hours, and unchanged by any supplement that is not a carbohydrate. PubMed record
2. Morton RW, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength. British Journal of Sports Medicine 2018;52(6):376-384: protein supplementation added around 0.3kg of fat-free mass, with the benefit plateauing at total intakes around 1.6g per kilogram a day. PubMed record
3. The delayed-onset muscle soreness intervention literature: meta-analyses of tart cherry, curcumin, omega-3 and antioxidants report small and inconsistent reductions in soreness after unaccustomed exercise, with no effect on the recovery of strength large enough to change training, and with the repeated-bout effect of training itself the largest protection. PubMed record
4. The athlete sleep literature: consensus statements and trials identify caffeine timing, late high-intensity training, evening light exposure and irregular schedules as the modifiable drivers of poor sleep in training populations, with sleep extension improving performance measures. PubMed record

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