First, don't stretch before strength training.
Stretching here refers to "static stretching". Before training, we should do "dynamic stretching", which will make us move back and forth within the range of exercise and help our bodies and muscles prepare before exercise, while static stretching is the opposite. Scientific research shows that static stretching will only have a negative impact on our sports performance, so stretching before training must be dynamic. When we finish training, static stretching is a good choice to relax tight muscles.
Second, don't drink a lot of water before exercise.
When you exercise, your stomach is full of water, which makes you feel sick and even cramp! When we are exercising, we should make proper hydration between groups, instead of pouring it down at once and drinking it slowly.
Don't drink too much coffee before practice.
Coffee can refresh the mind, make exercise more active, and help to consume the right amount. But the premise is the right amount! If you consume too much caffeine, it will stimulate the body to secrete too much bile, leading to diarrhea. Excessive caffeine intake will also produce a series of side effects, such as irritability, insomnia, increased heart rate, anxiety or heartburn, any of which will seriously affect our training, so you must control the amount of coffee!