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Plank with Leg Raise is an advanced variant of the plank exercise that specifically trains the abdominal and core muscles. Be sure to maintain a straight body line throughout the exercise and tightly engage your abdominal and gluteal muscles to stabilize your posture.
Begin in a plank position by getting into a push-up position, but place your forearms on the ground instead of your hands.
Now stretch one leg straight back and lift it as high as possible without rotating or tilting your hip.
Hold this position for a few seconds and then slowly lower the leg.