ديناميكية النشاط العضلي للطرف السفلي خلال مرحلة البدء المنخفض و الخطوتين الأولى و الثانية لمتسابقي 100 متر عدو

Abstract EN

The study aims to determine the percentage of muscle contribution and to identify the dynamics of muscle activity of the lower extremity during the block start stage and the first and second steps of the 100-meter sprinters.

the researchers used the descriptive approach, and the basic study was applied to a deliberate sample of (4) high-level players registered with the egyptian athletics federation, measurements were made, analyzed, and data were extracted to record the electrical activity of the muscles for the low start phase and the first and second steps, the most important results were that the rectus lateral femoral muscles, the gluteus maximus, the VL, GL and GM muscles are the most active muscles in the starting and starting phase and also play a crucial role in reaching the correct position during the starting from the block starting.

the results also showed that there are differences between the ratios of the contribution of the electrical activity of the muscles of the right and left leg during the starting phase due to the different angles of action of the lower limb in the starting position and acceleration and that the muscles responsible for the dynamics of movement during the starting phases and the first and second steps (acceleration) were VL, GM, GL the results also showed that the anterior rectus femoris and the biceps femoris RF-BF had their primary role in stabilizing the knee joint during the first and second steps after starting from the block starting.

until the landing of the first and second step.