You can be on court for two hours and playing for thirty five minutes of it. That rhythm builds a genuinely excellent athlete and prepares you badly for ninety minutes with nowhere to stand still.
Here is what the published research says about both, where a tennis week and a race block genuinely collide, and what a week that holds them together looks like. Every figure below links to its source.
A review of tennis physiology in the British Journal of Sports Medicine puts the mean point duration at 8.00 seconds, with a standard deviation of 2.58, and work-to-rest in high level matches between 1:2 and 1:5. Around twenty seconds sits between points and ninety seconds after every second game.
Add it up and total playing time is only about 20 to 30 percent of the time you spend on court, varying by style: roughly 21 percent for attacking players, 28.6 percent for whole court players and 38.5 percent for baseliners. Heart rate during 85 minutes of collegiate match play averaged 144.6 beats per minute. That is a real training stimulus, delivered in a pattern of bursts and pauses.
The wear is concentrated in one place. Between 40 and 50 percent of tennis players develop lateral elbow tendinopathy at some point, which is the condition the sport gave its name to. It is the most predictable injury in racket sport and worth training against rather than waiting for.
A HYROX race is eight one kilometre runs, each followed by a station: SkiErg, sled push, sled pull, burpee broad jumps, row, farmers carry, sandbag lunges, wall balls. There is no changeover, no towel, no second serve. The clock does not stop between the run and the station.
The first published physiological study of the race followed 11 recreational athletes through a full simulation. Median finish was 86 minutes, of which 51 were spent running. Heart rate and lactate stayed high throughout, running slightly higher at the stations than on the runs, with wall balls producing the worst lactate of the day.
What predicted finishing time was aerobic capacity. What did not predict it was grip strength, which showed no relationship with performance at all. Eleven athletes is a small study and the first of its kind, so hold it lightly. It is still worth knowing before you decide the answer to a racket sport background is to train your forearms harder.
Not in theory. On specific days, in specific tissue. Three collisions do most of the damage.
This is what makes tennis different from every other racket sport we write about. You have a genuine overhead serve delivered at speed, dozens of times a match, and it is the most demanding thing your shoulder does. The race then asks for a thousand metres of SkiErg, which is a repeated overhead pull, and closes with a hundred wall balls, which is a repeated overhead throw.
Put a SkiErg session the day before you play and you serve on a shoulder that has already done its overhead work for the week.
Tennis already loads the structure that 40 to 50 percent of players eventually injure. Three race stations tax the same forearm tissue: the farmers carry, the sled pull and the rower. Heavy pulling on Monday and tennis on Tuesday asks an already irritable tendon to perform tired.
To be clear about what this is not: grip strength did not predict HYROX performance. This is a claim about repeated load on a tendon, not about your finishing time.
Tennis teaches you to empty the tank for eight seconds and refill it for twenty. That is a skill, and it is the wrong one for a race that never lets you stop. The most common way a good tennis player has a bad first race is going out at a pace that feels comfortable because comfort in tennis includes a pause.
This is a training gap rather than a fitness gap, and it is fixed by practising continuous effort rather than by getting fitter.
Continuous effort, and strength. Points last eight seconds and the heaviest thing on court is a racket, so nothing about a tennis week prepares you to move a 152 kg sled or to run a fifth kilometre on legs that have already done four.
Anything above your head that is not a wall ball, and anything sideways. A race plan runs forwards and lifts in straight lines. Train only that and you walk onto court with a shoulder that has not rotated at speed and hips that have not moved laterally in twelve weeks.
Which is the real argument for one plan rather than two. Two plans written separately do not know about each other; they just take turns using the same arm.
Tell Smash Coach you play tennis and your court days go in first, as the hard days they are, with the race training built around them. Concretely:
External rotation and scapular strength for the serving shoulder. This is the single biggest gap a pure race plan leaves in a tennis player, because the race asks the shoulder to pull and throw but never to accelerate a serve.
Medicine-ball throws and cable rotations. A groundstroke and a serve are trunk rotations delivered at speed, and a back that rotates under control is a back not absorbing the shot on its own.
Direct wrist flexor and extensor work for the tissue behind tennis elbow, which 40 to 50 percent of players eventually meet, and which no HYROX station will strengthen for you.
The muscles that hold a knee steady when you push off sideways, which running in a straight line never trains. Tennis asks for this on every wide ball.
Heavy carries, sled pulls and rowing are kept off the day before you play, so your racket arm turns up fresh. The work still happens, on a day that does not cost you a match.
Sessions that deliberately never stop, so race day is not the first time you have held one effort for ninety minutes. Tennis will not teach this and the plan has to.
Tell Smash Coach which nights you play, what you are training for, and anything that currently hurts. Your first week is built around your actual schedule in minutes.
Open any of them. If a number on this page is not in one of these, it should not be on this page.
General information about training, not medical advice. If something hurts, see a clinician.
