Tác động của đào tạo tĩnh điện cường độ cực đại so với cường độ dưới cực đại khi thực hiện đến mức kiệt sức tự nguyện

Springer Science and Business Media LLC - Tập 117 - Trang 2099-2108 - 2017
Joel R. Krentz1, Philip D. Chilibeck2, Jonathan P. Farthing2
1Department of Physical Education, Faculty of Education, Brandon University, Brandon, Canada
2College of Kinesiology , University of Saskatchewan , Saskatoon , Canada

Tóm tắt

Mục tiêu của chúng tôi là so sánh đào tạo tĩnh điện cường độ cực đại với cường độ dưới cực đại được thực hiện cho đến khi kiệt sức tự nguyện. Ba mươi hai người trưởng thành trẻ (19 nam) đã được phân ngẫu nhiên vào một trong ba nhóm: (1) ECC110 thực hiện các co cơ đồng tâm tĩnh điện (ECC) chỉ ở 110% mức tối đa của đồng tâm (CON) 1-lần lặp tối đa (1RM); (2) ECC80 thực hiện các co cơ ECC chỉ ở 80% của CON 1RM; (3) nhóm kiểm soát. Đào tạo tiến triển từ 3 đến 6 hiệp đào tạo tĩnh điện một bên của cơ gập khuỷu trong 8 tuần, với mỗi hiệp được thực hiện cho đến khi kiệt sức tự nguyện. Độ dày cơ của cơ gập khuỷu (qua siêu âm) và 1RM được đánh giá trước và sau đào tạo. Mức độ cảm nhận nỗ lực (RPE) và cơn đau cơ được tự báo cáo. Cả ECC110 (+0,25 cm) và ECC80 (+0,21 cm) đều cho thấy sự gia tăng độ dày cơ sau đào tạo lớn hơn so với nhóm kiểm soát (−0,01 cm) (p < 0,05), không có sự khác biệt giữa ECC110 và ECC80. ECC80 (+1,23 kg) cho thấy sự gia tăng sức mạnh sau đào tạo lớn hơn so với nhóm kiểm soát (p < 0,05), trong khi ECC110 (+0,76 kg) không có sự khác biệt đáng kể sau đào tạo so với nhóm kiểm soát (−0,01 kg). ECC80 có điểm RPE trung bình thấp hơn đáng kể so với ECC110 (p < 0,05). Cả đào tạo tĩnh điện cường độ cực đại và đào tạo tĩnh điện cường độ dưới cực đại đều hiệu quả trong việc tăng kích thước cơ, nhưng đào tạo tĩnh điện dưới cực đại được cho là cần ít nỗ lực hơn so với đào tạo tĩnh điện cực đại. Những phát hiện này gợi ý rằng đào tạo tĩnh điện dưới cực đại có thể là một chiến lược lý tưởng để tăng kích thước và sức mạnh cơ bắp ở những cá nhân có nhu cầu cần đào tạo ở mức nỗ lực thấp hơn.

Từ khóa

#đào tạo tĩnh điện #cường độ cực đại #cường độ dưới cực đại #kiệt sức tự nguyện #kích thước cơ bắp #sức mạnh cơ bắp

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