Int J Cardiol. 2009 Feb 6;132(1):133-5. doi: 10.1016/j.ijcard.2007.07.142. Epub 2007 Nov 26.
Nordic pole walking (NW) has gained significant attention to increase caloric expenditure vs. conventional walking without poles. However data are pending regarding the hemodynamic response of Nordic pole walking vs. walking. We hypothesized that NW increases cardiac output stronger than conventional walking at a given perceived level of physical exertion in a field test.
48 participants (51+/-11 years, BMI 25+/-3) were included and randomised for either Nordic pole or conventional 30 min of outdoor walking. Heart rate (HR), stroke volume (SV), and cardiac output (CO) were determined non-invasively using continuous CW-Doppler ultrasound (USCOM) for four times (before, immediately after physical exercise and after the first and third minute during recovery). Perceived level of exertion was 13+/-1 (NW) and 13+/-2 (walking, n.s.).
Immediately after peak exercise, heart rate increased significantly from 74+/-9 bpm to 123+/-20 bpm (66+/-4%, NW, p<0.05) and from 73+/-7 bpm to 137+/-30 bpm (73+/-7%, walking, p<0.05). CW-Doppler determined stroke volume increased from 48+/-10 ml to 59+/-24 ml (23+/-4%, p<0.05) and 45+/-20 ml to 50+/-13 ml (11+/-3%, p<0.05) immediately after peak exercise. Consecutive cardiac output increased from baseline 3.5+/-0.9 l/min to 7.3+/-3 l/min (NW) and from 3.4+/-1.2 l/min to 6.8+/-2.2 l/min (walking), respectively (both p<0.05). During recovery stroke volume significantly faster diminished within the first minute of recovery vs. heart rate and cardiac output in both groups. No changes between NW and walking were evident in hemodynamic parameters.
No significant difference in the extent of cardiac output up-regulation between Nordic pole walking and walking at a given level of physical exertion was found. Hemodynamic field testing is feasible using the portable CW-Doppler ultrasound USCOM.
北欧式健走（NW）已被广泛关注，因其在不使用手杖的情况下比传统行走能消耗更多热量。然而，关于北欧式健走与行走相比的血液动力学反应的数据仍有待研究。我们假设在现场测试中，在给定的体力活动感知水平下，NW 比传统行走能更强地增加心输出量。
纳入 48 名参与者（51+/-11 岁，BMI 25+/-3），并随机分为北欧式健走组或传统 30 分钟户外行走组。使用连续 CW-Doppler 超声（USCOM）非侵入性地在四个时间点（运动前、运动后即刻以及恢复后第一分钟和第三分钟）测定心率（HR）、每搏输出量（SV）和心输出量（CO）。运动感知水平为 13+/-1（NW）和 13+/-2（行走，无统计学差异）。
运动后即刻，心率从 74+/-9 bpm 显著增加到 123+/-20 bpm（66+/-4%，NW，p<0.05）和从 73+/-7 bpm 增加到 137+/-30 bpm（73+/-7%，行走，p<0.05）。CW-Doppler 测定的每搏输出量从 48+/-10 ml 增加到 59+/-24 ml（23+/-4%，p<0.05）和 45+/-20 ml 增加到 50+/-13 ml（11+/-3%，p<0.05）。运动后即刻，心输出量从基础值 3.5+/-0.9 l/min 增加到 7.3+/-3 l/min（NW）和从 3.4+/-1.2 l/min 增加到 6.8+/-2.2 l/min（行走）（均 p<0.05）。在恢复期间，与心率和心输出量相比，两组的每搏输出量在恢复的第一分钟内显著更快地下降。在给定的体力活动水平下，NW 和行走之间在心输出量上调程度上没有明显差异。使用便携式 CW-Doppler 超声 USCOM 进行血流动力学现场测试是可行的。
