Training
How to build cardio for MMA training
Add a repeatable block of aerobic work around the classes you already attend. Start at an effort you can control. Getting tired in the clinch can come from holding your breath or squeezing every grip as hard as possible, even when your running fitness is good.
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Find a pace you can repeat
Try a brisk walk, bike ride or other familiar activity on a day that fits your classes. The CDC uses conversation as one guide to aerobic effort. At a moderate intensity, talking is possible but singing is difficult. Breathing and fitness differ between people, so use the cue on steady work rather than during a mouthguard drill.
Read a tiring round
Ask a coach to watch one short round on the pads. If you tense both shoulders between every punch, adding more intervals may just give you more practice staying tense. Change one cue, such as relaxing the shoulders on the return, then compare how the next controlled round feels.
Build a week you can judge
For an example week, place two technical classes on different days and add a manageable steady session between them if you feel ready. Record what you did and whether the next class still had good footwork. When the schedule settles, change either the duration or the challenge of the extra session, one at a time.
When to scale back
Speak to the coach if ordinary technical work keeps turning into an exhausting round. Make space for recovery instead of adding impact or extra sparring as a fitness test. If exercise produces unusual symptoms, stop and get appropriate medical advice.