Why Aerobic Base Matters Even in an Alactic Sport

A common refrain in modern tennis coaching: “Tennis is an alactic sport. Don’t waste time running.”

It is half-true. The point itself is alactic — five to ten seconds of high-intensity work fueled almost entirely by ATP-PCr stores. Whether a player can hit a 130 km/h forehand on the fifth shot of the rally is decided by anaerobic alactic capacity, not aerobic capacity. The phosphocreatine system is the engine of tennis effort.

But that is only one frame of the question. The question coaches should be asking is: what fuels the recovery between those alactic efforts? What restores the ATP-PCr system between points? What allows a player to repeat near-maximal efforts for three hours?

The answer is aerobic metabolism. And once you see that, you stop dismissing the aerobic base as irrelevant. You start treating it as the foundation that makes the rest of tennis fitness possible.

What Aerobic Metabolism Actually Does in Tennis

In the 25 seconds between points, the body does several things in parallel. Heart rate drops from 160–180 bpm down toward 130–140 bpm. Blood pH normalizes. Stress hormones partly clear. And — most importantly for the next point — the ATP-PCr system is restored.

Phosphocreatine is not regenerated by anaerobic glycolysis. It is regenerated almost entirely by oxidative (aerobic) metabolism. The mitochondria in muscle fibers consume oxygen and produce ATP, and that ATP is used to rebuild PCr from creatine. The faster this regeneration happens, the more “fresh” each point feels.

The research is consistent: PCr resynthesis follows a first-order kinetics with a half-time of roughly 30 seconds in well-trained athletes, and 60–90 seconds in untrained subjects (Bogdanis et al., 1995; Tomlin & Wenger, 2001). The well-trained athlete starts the next point with more available PCr. The untrained athlete starts with less.

Aerobic fitness directly governs this rate. A higher VO₂max and better mitochondrial density mean faster oxygen uptake at the start of recovery, faster ATP production, and faster PCr restoration. The aerobic system is the recovery system in tennis. It does not produce the shot. It produces the readiness for the next shot.

The Numbers: How Much Aerobic Capacity Tennis Players Need

VO₂max values for professional tennis players sit in a moderate range — typically 50–65 ml/kg/min for men and 45–55 ml/kg/min for women (Fernandez-Fernandez et al., 2009). These are well below endurance-sport elites (cyclists and distance runners commonly exceed 75 ml/kg/min), but well above the general population.

The interesting finding is what happens below a threshold. Players with VO₂max under about 50 ml/kg/min for men show significantly worse performance in the third hour of long matches — both in terms of stroke quality decline and in tactical decision quality. Above that threshold, the relationship flattens. More aerobic capacity does not equal proportionally better tennis. It is a floor, not a peak.

This is a critical coaching insight. A player below the floor is fitness-limited regardless of their technique. A player above the floor is no longer fitness-limited and can spend time on tennis-specific skills instead.

The practical translation: aerobic training in tennis is for getting above the floor, not for ranking competitive endurance athletes against each other. Once you are above it, more aerobic work has diminishing returns.

What Aerobic Base Training Looks Like for Tennis

This is where most amateur tennis programs get confused. “Aerobic training” gets interpreted as long, slow distance running — and then dismissed as not tennis-specific.

The dismissal is partly right. Slow continuous running for hours has a poor transfer profile to tennis: it trains a fiber recruitment pattern, a heart rate response, and a movement pattern that tennis does not use. Worse, high-volume distance running can mildly suppress the explosive qualities tennis requires (Wilson et al., 2012).

But “aerobic training” is broader than long distance running. Three formats deliver aerobic adaptation while preserving tennis specificity:

Format 1: Tempo intervals. Two to four minutes of moderate-to-hard effort followed by equal recovery, repeated four to eight times. Heart rate sits in the 80–90% range of max. The aerobic system is heavily taxed but the format also retains some power output. Done on a bike, a rower, or in shadow drills on court. Twice a week is plenty.

Format 2: Sport-specific intermittent work. Short maximal efforts (10–20 seconds) with short recovery (20–40 seconds), repeated for 15–30 minutes. This format closely mimics match demands and trains both alactic capacity and aerobic recovery. Court sprints, shadow patterns, or hitting drills with high ball-feeding density all qualify.

Format 3: Moderate continuous work, kept short. 25–35 minutes at conversational pace, on legs (running) or off legs (bike, elliptical, swimming). Once a week. This is the lowest-cost aerobic stimulus and the most easily fitted around tennis training. The key is to keep it under 40 minutes — longer durations start to interfere with neuromuscular qualities.

The Cardiac Drift Problem in Long Matches

There is a phenomenon called cardiac drift: during prolonged exercise, heart rate slowly rises even though work rate stays constant. The mechanism is partly thermoregulatory — blood is diverted to the skin for cooling, and the heart compensates by beating faster to maintain cardiac output. The mechanism is partly fluid-balance: as plasma volume drops with sweat loss, stroke volume falls and HR rises to compensate.

In tennis, cardiac drift manifests in the third set of a long match. The same point that produced 160 bpm in the first set now produces 175 bpm. The same recovery between points that brought HR back to 130 bpm now only brings it back to 145 bpm. The player feels heavier, slower, and starts losing fine motor control of the racquet.

Aerobic base training reduces cardiac drift in two ways. First, a fitter heart with a larger stroke volume requires less rate increase to maintain cardiac output. Second, better thermoregulation through repeated aerobic stress conditions the body to tolerate prolonged heat load. Players with stronger aerobic bases show measurably less HR drift in the same workload (Coyle & González-Alonso, 2001).

This is why I argue, against the alactic-purist position, that aerobic capacity is a tactical asset. The player who is fitness-limited in the third hour cannot execute their game plan. The player with the aerobic floor stays sharp.

The Best-of-Five Problem

The aerobic case becomes especially strong in best-of-five matches. Singles matches at the major level routinely exceed three hours; some exceed five. Energy system contribution shifts as match length grows. Studies of long Grand Slam matches show progressively greater reliance on aerobic metabolism after the second hour — not because the points themselves become aerobic, but because the cumulative load on the recovery system grows (Reid et al., 2008).

This is the elite version of the same problem amateurs face in a long club match. The longer the contest, the more aerobic capacity matters — not for the next point, but for the next set.

Common Mistakes in Tennis Aerobic Training

In my own coaching practice, I see three repeated errors:

Mistake 1: Too much volume, too slow. A 70-minute jog at conversational pace, three times a week. This is not training for tennis. It is training for jogging. The neuromuscular cost is real and the tennis benefit is small.

Mistake 2: Confusing on-court drilling for conditioning. “We had a long session, so we got fit.” A long session of feeding balls at low intensity does not raise aerobic capacity. It may even reduce explosive qualities through accumulated fatigue. Conditioning requires intensity, not just duration.

Mistake 3: Skipping aerobic work because of the alactic argument. This is the most common mistake at the higher levels of coaching. The argument is technically defensible — “tennis is alactic, train alactic” — but it ignores that aerobic capacity is the floor that makes the alactic system useful between points. Without that floor, you have a player who can hit one great shot but not eighty of them in a row.

A Realistic Weekly Aerobic Allocation

For a competitive adult tennis player at the regional-to-national level, the aerobic allocation in a normal training week looks roughly like this:

• One tempo-interval session (4×3 min hard / 3 min easy, on bike or rower). 30 minutes total.
• One moderate continuous session (25–30 min easy run or bike), as an active-recovery day.
• Multiple short embedded sessions within tennis practice itself — drilling blocks of 15 minutes that keep heart rate in the 75–85% zone.

That is two to three dedicated aerobic touches per week, none of them exceeding 35 minutes. The total weekly aerobic time is under 90 minutes outside tennis practice. It is enough to get above the floor and stay there. It does not interfere with the alactic and power qualities that win points.

One Thing to Do on Court Tomorrow

After your next tennis session, do a four-set tempo interval on a stationary bike: 3 minutes at hard but sustainable pace (around 85% of your max heart rate), 3 minutes easy spinning. Repeat four times. Total time: 24 minutes. Done twice a week for six weeks, this single addition will measurably improve how you feel in the third set of any future long match. Your alactic engine produces the shots. Your aerobic engine lets you do it again, and again, and again.

About the author: Emre Köse is a tennis coach at Beykoz Tenis Kulübü in Istanbul, with 12+ years on court. He holds a BSc in Coaching Education from Marmara University, Faculty of Sport Sciences.

Related in this series: What tennis actually demands physiologically · ATP-PCr: the engine of the point · Heart rate dynamics during a match

Selected references:

• Bogdanis, G. C., Nevill, M. E., Boobis, L. H., & Lakomy, H. K. (1995). Recovery of power output and muscle metabolites following 30 s of maximal sprint cycling in man. Journal of Physiology.
• Coyle, E. F., & González-Alonso, J. (2001). Cardiovascular drift during prolonged exercise. Exercise and Sport Sciences Reviews.
• Fernandez-Fernandez, J., Sanz-Rivas, D., & Mendez-Villanueva, A. (2009). A review of the activity profile and physiological demands of tennis match play. Strength and Conditioning Journal.
• Reid, M., Duffield, R., Dawson, B., et al. (2008). Quantification of the physiological and performance characteristics of on-court tennis drills. British Journal of Sports Medicine.
• Tomlin, D. L., & Wenger, H. A. (2001). The relationship between aerobic fitness and recovery from high-intensity intermittent exercise. Sports Medicine.
• Wilson, J. M., Marin, P. J., Rhea, M. R., et al. (2012). Concurrent training: a meta-analysis examining interference of aerobic and resistance exercises. Journal of Strength and Conditioning Research.