<h3><span style="max-width: 100%; color: rgb(62, 62, 62); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-weight: bold; letter-spacing: 1px; white-space: normal; word-wrap: break-word !important; overflow-wrap: break-word !important;">背包过大、</span><strong style="max-width: 100%; color: rgb(62, 62, 62); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 1px; white-space: normal; text-decoration: inherit; font-size: 18px; word-wrap: break-word !important; overflow-wrap: break-word !important;">过沉</strong><span style="max-width: 100%; color: rgb(62, 62, 62); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-weight: bold; letter-spacing: 1px; white-space: normal; text-decoration: inherit; word-wrap: break-word !important; overflow-wrap: break-word !important;">会加重肩部负担，尤其是单肩大包，容易导致背部肌肉受力不均，造成脊椎和腰部劳损，出现颈肩和腰背酸痛，甚至“高低肩”。</span><br></h3> <h3>一开始做这些动作，可能没习惯，会有点疼，必须忍一忍，坚持下来定能见到成效。<br></h3>