Bout Ready
Round conditioning calculator
Enter your fight format and get conditioning that matches it: the work:rest between rounds, what the work looks like inside a round for your sport, how many rounds to simulate, how the sessions should change across camp and how long your easy aerobic sessions should be.
The numbers come from the Bout Ready coaching rulebook and from time-motion studies of real MMA, boxing and BJJ bouts. Everything runs in your browser.
Your fight format
How it works
Work:rest between rounds
Round length divided by rest. A 3-minute round with 1 minute's rest is 3:1; a 5-minute MMA round with 1 minute's rest is 5:1. Elite amateur boxing in Great Britain is 3 x 3 minutes with 1 minute's rest for men and women (GB Boxing). Your round simulations use your real rest, so you train the recovery you'll actually get.
The work pattern inside a round
This is the part most conditioning plans miss. The ratio between rounds tells you nothing about what happens inside them, and the three sports are very different:
- MMA is stop-start. In regional MMA, high-intensity effort against low-intensity work and pauses ran at about 1:2 to 1:4 (del Vecchio 2011). In simulated 3 x 5-minute sparring it was 1:3, and blood lactate rose to about 15.6 mmol/L (Coswig 2016). The calculator shows bursts of 10 seconds hard with 20-40 seconds of easier work. For example, at 1:3 a 5-minute round holds 7 full 40-second cycles: 70 seconds of hard work.
- Boxing is near-continuous. Activity-to-rest ratios inside amateur rounds were 18:1 in elite and 9:1 in novice boxers (Slimani 2017). The calculator asks for work during at least 90% of each round, with changes of pace rather than stops.
- BJJ is a continuous clock with short bursts. In regional gi matches, high-intensity actions lasted about 4 seconds (Andreato 2013). The calculator uses 3-6 second bursts every 20-40 seconds for the gi, and denser work for no-gi.
How many rounds to simulate
For 2- and 3-minute rounds up to 6 rounds, simulate one more round than the fight (N+1). For 5-minute MMA rounds and long pro boxing fights, simulate the scheduled number (N), never more than 10. This is a coaching rule, not a tested one, and it applies to conditioning only, never to sparring.
The camp progression
Early in camp and between fights, the hard sessions are 3-minute aerobic intervals at about 75% with 2 minutes easy. In the strength and power blocks they become 3 minutes at about 85% with 1 minute easy. In the last block before the taper they become round-length efforts at fight pace. This is the progression the Bout Ready app uses. High-intensity intervals of at least 4 weeks improve aerobic fitness and anaerobic power in combat athletes (Yue 2025; Vasconcelos 2020).
Easy aerobic sessions
Sized to the fight: 20-40 minutes for short formats (up to 4 rounds of 3 minutes or less), 30-45 minutes for up to 24 fighting minutes, and 30-60 minutes beyond that. For BJJ: 20-40 minutes for white and blue belts and 30-45 for purple and above, moving up one band for a tournament day. Aerobic fitness matters even in short fights. MMA fighters below about 53 ml/kg/min of VO2max found 3 x 5-minute sparring harder than fitter fighters did (Kirk 2024), and amateur boxing bouts were about 73% aerobic (Bruzas 2022).
Limits
Most of this research is on men and on amateurs. No study has measured heart rate or lactate in professional boxing bouts, so pro numbers are extrapolated. The BJJ match lengths are the usual adult IBJJF times; check your own event's rules. To see where conditioning fits in your week, read How to fit lifting and conditioning around sparring, and for the final 2 weeks, How to taper before a fight.
Questions
What is a good work-to-rest ratio for boxing conditioning?
Between rounds, match your fight: 3:1 for 3-minute rounds with 1 minute's rest. Inside the round, boxing is near-continuous, so keep working for 90% or more of it. Earlier in camp, 3-minute intervals with 1-2 minutes easy build the base.
What work-to-rest ratio should I use for MMA?
5:1 between 5-minute rounds with 1 minute's rest. Inside the round, use bursts of about 10 seconds hard with 20-40 seconds of easier work (1:2 to 1:4), because that's what time-motion studies of MMA bouts show.
Should I do more rounds in training than in the fight?
For short formats, one more (N+1) in conditioning is a common coaching rule. For 5 x 5-minute fights and 10-12 round pro fights, match the scheduled number and never go beyond 10 simulated rounds. Extra rounds of hard sparring add head contact, so this applies to conditioning only.
Is Tabata good conditioning for fighters?
The original Tabata study used 7-8 very hard 20-second efforts (about 170% of VO2max) with 10 seconds of rest, 5 days a week for 6 weeks, and improved both aerobic and anaerobic capacity. It's a useful tool, but it's 4 minutes long and doesn't match the length or pattern of a fight round, so it shouldn't be your whole programme.
Should I use conditioning to make weight?
No. Conditioning is for fitness. Using hard sessions or sweat suits to drop weight risks heat illness and leaves you flat. Plan any cut with WeighCamp.