Keeping your legs straight during leg raises often requires focus and potentially addressing underlying flexibility issues. The key is to maintain a consistent angle at your knees throughout the movement unless deliberately moving your heels.
Here's a breakdown of how to achieve and maintain straight legs during leg raises:
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Focus on Maintaining Angle: Concentrate on keeping the same angle at your knees from the start to the end of each rep. Avoid bending and straightening your knees during the lift.
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Listen to Your Body: It's okay if your legs aren't perfectly straight initially. Flexibility improves over time.
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Avoid Heel Movement (Unless Intended): Only deviate from the straight leg form if you are doing exercises specifically designed to include bending at the knee and heel movement. When you are lifting your legs, your heels do not need to move towards and backward.
In summary, maintain a constant knee angle throughout the leg raise, and focus on control rather than perfect straightness, especially when starting out.