Tennis court guide

The Tennis 4x4: A 35-Minute Workout for Players Who Die in the Third Set

Tennis points are short bursts: 5–10 seconds of sprinting, lunging, and recovering, then 20 seconds to reset. How fast and how completely you recover between those bursts can be a deciding factor.

Professional tennis matches can last for hours. Where do the tennis players get the stamina to perform and endure multi-hour matches and still stay fast and efficient? Among many things, VO₂ max is a key measure of performance and increasing it is a major goal for tennis athletes. Think of VO₂ max as your body's engine size: a measure of how efficiently you use oxygen when the effort peaks. The bigger the engine, the longer and faster you can go.

The best-studied workout in the world for raising VO₂ max is the Norwegian 4x4 — four 4-minute efforts at 85–95% of max heart rate, with 3 minutes easy between. In the original research (Helgerud et al., 2007), 4x4 training beat steady jogging and threshold runs for the same total work, and it's been the benchmark protocol for athletes ever since. Here's how to do it without leaving the court.

The workout

Total time: ~35 minutes. You need: a court, a racquet, no balls required.
Warm-up (8 min): Easy footwork around the court, some side shuffles, carioca, a few progressively harder ghost swings.
Then 4 rounds of:
4 minutes ON — ghosting at match-plus intensity. Pick a pattern and shadow it full speed with real swings:

Corners: alternate wide forehand → wide backhand from the center mark
Spider: center → each of the 5 cone positions (both corners, both sidelines, net) and back
Attack-and-recover: baseline → short ball at the service line → backpedal for the lob

Rotate patterns each round so your brain stays in it. The target is 85–95% of max heart rate — by minute 3 you should be breathing too hard to talk. If you can chat, move faster. If you're falling apart before minute 4, throttle to "uncomfortably sustainable."

3 minutes OFF — active recovery. Walk the lines, easy shadow swings, sip water. Don't sit down; the slow movement clears your legs for the next round.

Once you're done with the rounds, perform a cool-down — easy walking and stretching.

The partner version

Everything's better with a hitting partner, including suffering. One player feeds side-to-side from a basket (or hand-feeds) for 4 minutes while the other runs the pattern hitting real balls — then swap roles, so your feeding block doubles as the recovery interval. You each get 4 work rounds, the ball makes you honest, and the footwork stays tennis-specific instead of treadmill-generic.

How often, and what to expect

Twice a week is plenty alongside your normal match play — say Tuesday and Friday, never the day before a match that matters.

And you don't have to do it on a court every time. The 4x4 is heart-rate based, not drill-based, so any equipment that gets you to 85–95% of max heart rate works: a treadmill (a slight incline helps), a stationary bike, a rower, a stair climber, or a hill near your house. Same structure — 4 minutes hard, 3 minutes easy, four rounds. Rainy week, court's booked, or your legs want a break from cutting and lunging? Take it to the gym and the engine still grows. The on-court ghosting version just adds tennis-specific footwork on top.

In the research, eight weeks of 4x4 raised VO₂ max around 7% in already-active people. On court, that shows up as the thing money can't buy: standing at the baseline at 5–5 in the third, fully recovered at the end of the 25 seconds, while the player across the net is still hands-on-knees.