Some students avoid practice in hot weather. Depending on the individual’s health, I think that this is a mistake.
In Japan, traditional budo considers hot-weather practice to be an important part of training. Practising realistically in hot weather will make you a stronger, better Aikidoka.
Having said that, it’s important to protect your health. You should be aware of the effects of heat – especially, heat stroke.
https://www.mayoclinic.org/diseases-conditions/heat-stroke/symptoms-causes/syc-20353581
Speaking as someone who once experienced hyperthermia during a hot practice, I will say, “Don’t be stupid.”
It’s normal for students to pause to drink water or rest when feeling excessive duress as a result of heat during practice. Age, fitness and medications can all determine your ability to tolerate heat. Don’t overestimate your capacity.
Hot weather practice gives you an opportunity to challenge yourself, practice the details more slowly and become more flexible as you accept deeper stretches during pins and other techniques.
Don’t risk your health – but don’t completely avoid practice just because the dojo is hot.
