Like a frog, lie on the ground and slowly open your knees to both sides, with thighs and hips at 90 degrees and thighs and calves at 90 degrees. Tighten your abdomen, don't climb to the ground, put your hands on the ground, focus on your hips, remember to focus on your waist or hands, relax your whole body, breathe slowly, stick to the ground, and relax your crotch until the root of your crotch sticks to the ground, that is, you can feel the pressure in your groin when you lie down.
Extended data
Fitness precautions:
You can put a blanket on your knees, because lying down for a long time will hurt your knees. Pay attention to your body at right angles to your hips and knees.
Pay attention when pressing your hips. When the adductor muscle of thigh is too tight and the hip joint can't be opened, not only the pressure of hip joint, knee joint and ankle joint will increase obviously, but also the lumbar spine will probably compensate the stress and produce lumbar discomfort.
First of all, the inner thigh can't touch the ground. Take your time, do your best, don't force it, and be careful of strain. I may not get up if I lie down for a long time.
reference data
Baidu encyclopedia-frog style
People's Network-How can fitness be effective?