Stevens Sandra L, Morgan Don W
Department of Health and Human Performance, Middle Tennessee State University , Murfreesboro, Tennessee.
Top Spinal Cord Inj Rehabil. 2015 Winter;21(1):40-8. doi: 10.1310/sci2101-40.
Walking on a submerged treadmill can improve mobility in persons displaying lower limb muscle weakness and balance deficits. Little is known, however, regarding the effect of water treadmill exercise on cardiac performance in persons with incomplete spinal cord injury (iSCI).
To assess heart rate response during underwater treadmill training (UTT) in adults with iSCI.
Seven males and 4 females with iSCI (age = 48 ± 13 years; 5 ± 8 years after injury) completed 8 weeks of UTT (3 sessions per week; 3 walks per session) incorporating individually determined walking speeds, personalized levels of body weight unloading, and gradual, alternating increases in speed and duration. Heart rate was monitored during the last 15 seconds of the final 2 minutes of each walk.
Over the course of 3 biweekly periods in which walking speed remained constant, heart rate fell by 7% (7 ± 1 b•min(-1); P < .001) in weeks 2 and 3, 14% (17 ± 6 b•min(-1); P < .001) in weeks 4 and 5, and 17% (21 ± 11 b•min(-1); P < .001) in weeks 6 and 7.
In adults with iSCI, progressively greater absolute and relative reductions in submaximal exercise heart rate occurred after 2 months of UTT featuring a systematic increase in training volume.
在水下跑步机上行走可改善下肢肌肉无力和平衡能力不足者的活动能力。然而，关于水下跑步机运动对不完全性脊髓损伤（iSCI）患者心脏功能的影响，人们知之甚少。
评估不完全性脊髓损伤成年患者在水下跑步机训练（UTT）期间的心率反应。
7名男性和4名女性iSCI患者（年龄=48±13岁；受伤后5±8年）完成了8周的UTT训练（每周3次训练；每次训练3次步行），训练结合了个体确定的步行速度、个性化的体重减轻水平，以及速度和持续时间的逐步交替增加。在每次步行最后2分钟的最后15秒监测心率。
在3个双周期间，步行速度保持恒定，第2周和第3周心率下降7%（7±1次•分钟-1；P<.001），第4周和第5周下降14%（17±6次•分钟-1；P<.001），第6周和第7周下降17%（21±11次•分钟-1；P<.001）。
在不完全性脊髓损伤的成年患者中，经过2个月以训练量系统增加为特征的UTT训练后，次最大运动心率出现了逐渐更大的绝对和相对下降。
