What to Eat Before a Row: A Practical Guide for Indoor Sessions

The context

Most indoor rowing sessions are somewhere between thirty minutes and ninety, and a two-thousand-metre piece is shorter than that. So the honest first question is what the session actually asks of your body, because that sets everything else. A long steady piece draws on carbohydrate. A thirty-minute interval set draws on something else. A race is not a meal scenario at all.

There is a second framing issue that runs through every source below, and it is worth stating once: almost none of this research is about rowers. The populations are runners, cyclists, weightlifters and general exercising adults. Two of the studies most often cited for rowing-specific advice turn out to be about cyclists and about nothing at all. So the useful way to read the literature is as mechanisms and ranges, applied to your own session and then judged by what happens to you.

The core idea

Pre-session eating is a daily plan that happens to end in a meal, not a single meal. The organising concept comes from Burke and colleagues: an athlete's carbohydrate intake can be judged by whether total daily intake and the timing of consumption in relation to exercise maintain adequate carbohydrate substrate for the muscle and the central nervous system, or whether it is limiting the daily programme ([2] Burke 2011). That framing does something useful for a club rower. If you arrive on Tuesday having eaten well and trained hard on Sunday, Tuesday's snack is a small adjustment. If you arrive having eaten well all week but skipped breakfast and trained a long piece yesterday morning, no snack fixes it.

The old glycogen literature is the clearest demonstration that this is a daily question. Trained runners on three different diet-and-exercise regimens raised muscle glycogen to different levels, and the paper's own conclusion was blunt: glycogen can be elevated with a moderate regimen, and carbohydrate loading was of no benefit to performance over a 20.9 km run ([4] Sherman 1981). More was not better, and the study population was runners, not rowers.

Protein is a daily number, split across the day. The consensus is 1.3 to 1.8 grams per kilogram of body weight a day, consumed as three or four meals of similar protein content, with 1.8 to 2.0 grams per kilogram advantageous during a period of energy restriction ([3] Phillips 2011). The per-meal figure that matters is smaller: a dose of roughly a quarter to two fifths of a gram per kilogram, every three to four hours, is what appears to maximise muscle protein synthesis ([7] Kerksick 2017). For an eighty-kilo rower that is a serving the size of your palm rather than a scoop of powder.

What you eat during the session is where the numbers actually are. Carbohydrate should be taken at about 30 to 60 grams an hour for bouts that run beyond seventy minutes ([7] Kerksick 2017), and intakes of up to 90 grams an hour are an option only for events beyond two and a half hours ([2] Burke 2011). For most indoor sessions that means no carbohydrate during the piece at all. It also means the per-hour ladders you see published, which often start at 60 grams an hour, are tuned for events that are several times longer than anything most rowers do in a club session.

Fluids are individual, and the position stand says so. Prehydration with drinks on top of normal meals and fluid intake should begin at least several hours before the activity, so that you start euhydrated and are not still passing urine at the start line ([5] American College 2007). During exercise the goal is to prevent excessive dehydration - more than about two per cent of body weight - and because sweat rates and sweat electrolyte content vary considerably between people, the stand recommends working out your own rate and drinking to that. For scale, active athletes in hot weather can lose four to ten litres of water and three and a half to seven grams of sodium across a day ([6] Shirreffs 2011). Measuring your own rate is simple: weigh yourself before and after, and the difference in your weight is the net change over the session, not the sweat loss on its own. If you drank nothing during it, that difference is your sweat loss; if you did drink, add what you drank back on, and any urine you passed comes off the other side too.

Sodium has less support than it gets. The one trial in this set that actually tested it gave nine trained cyclists 700 milligrams of salt an hour through a 72 km time trial at 13.8 degrees, and performance was unchanged: 171 minutes against 172 ([10] Cosgrove 2013). That is a null result in cool conditions with a during-exercise dose, and it is not a licence for a high-sodium preload. It does mean that a per-hour sodium ladder has very little behind it.

Caffeine is the best-evidenced drug in the set. The umbrella review of twenty-one meta-analyses found caffeine ergogenic for aerobic endurance, strength, muscle endurance, power, jumping and speed, with the largest and most consistent effect on aerobic work ([8] Grgic 2020). The position stand puts the working dose at three to six milligrams per kilogram, taken about sixty minutes before. The minimum effective dose is less settled: it may be as low as two milligrams per kilogram, and the stand is explicit that this figure currently remains unclear. Very high doses, nine milligrams per kilogram, come with a high incidence of side effects and do not seem to be needed for the effect anyway ([9] Guest 2021). Two caveats ride along: most of the underlying studies are in young men, and between people the response varies with genetics, habitual intake and anxiety.

Gut trouble is common and mostly mechanical. Somewhere between thirty and fifty per cent of athletes experience gastrointestinal complaints during exercise, and the causes are physiological, mechanical and nutritional ([11] de Oliveira 2014). In intense exercise, especially when you are dehydrated, blood flow to the gut falls, and that is believed to be a main contributor. The practical lever is gastric emptying: choices that clear the stomach quickly reduce the risk. That is the honest basis for eating earlier rather than later, and for sticking to food you have eaten before. It is not a basis for a low-fibre or low-fat rule, which the source does not state, and the review itself notes that evidence for specific nutritional interventions is still lacking.

Low-FODMAP eating is a targeted tool, not a default. For athletes with persistent exercise-associated symptoms, reducing FODMAPs is described as an emerging strategy, and the same review finds no benefit from a gluten-free diet in athletes without coeliac disease ([12] Lis 2019). If your gut is fine, changing your diet for it will cost you for nothing.

The how-to

Eat for the day, not for the session. Put the carbohydrate in the meals around your training, not in the twenty minutes before it. If you want one concrete habit, make sure the day before a long piece is not also a fasted one.

Scale the meal to the session. A hard interval set needs less in your stomach than a long steady piece, and a race needs less than either. When in doubt, eat something familiar and eat it earlier in the preceding hours.

Keep a normal breakfast. The most common pre-session mistake in indoor rowing is arriving having had coffee and nothing else, then wondering why the first twenty minutes feel like a different sport. If nothing else, eat the same breakfast you would eat on a rest day.

Work out your own sweat rate. Weigh in before an ordinary session in the conditions you normally train in, weigh in again afterwards, and do not drink during it if you want a clean number. The difference in kilos is the net change, so add back anything you drank and allow for any urine. It tells you more than any published ladder. During a session, drink to keep the loss under about two per cent of your body mass.

Treat caffeine as a dose, not a switch. Three to six milligrams per kilogram, roughly an hour before, and start at the low end. More is not better: nine milligrams per kilogram is a very high dose, it comes with a high incidence of side effects, and it does not seem to be needed for the effect.

If your gut is the problem, change one thing at a time. Train with the food you plan to race with, and if symptoms persist, look at FODMAP reduction with a dietitian rather than removing whole food groups on your own.

The trade-offs

The first trade-off is that the pre-session meal is a smaller lever than the daily plan, and a lot of advice treats it as the whole story. The second is that we are applying ranges from other sports. There is no trial showing that a particular snack beats a different one in a rowing club, and anyone who tells you the exact grams for the ninety minutes before a session is quoting a framework, not a rowing result.

The third is caffeine's two-sidedness, which the position stand is unusually honest about: the same dose that helps a piece can cost you the night, and people differ in how they respond.

The fourth is that "nothing before a session" has become a habit in endurance training, sometimes for good reasons and sometimes because a disordered relationship with food has been dressed up as a discipline. The professional position is that individual nutrition plans should come from a registered dietitian ([1] Thomas 2016). If the decision to eat before training has become stressful rather than routine, that is a different conversation, and it is worth having with a clinician rather than with a menu.

What to do tomorrow

Pick two.

For the next week, eat a normal breakfast before a mid-week session and write down how the session felt. That single comparison is worth more than any published ladder.

Work out your own sweat rate on an ordinary session, in the conditions you actually train in, and use the number rather than a table.

If you drink coffee before rowing, count the milligrams - roughly ten per hundred millilitres of brewed coffee - and keep the total near the low end of three milligrams per kilogram, not the high end.

Stop treating a per-hour carbohydrate or sodium ladder as your plan. For a session under seventy minutes, the evidence does not ask for carbohydrate during it at all.