Nordic walking, (NW) is a healthy physical activity reported to significantly increase O2 consumption and energy expenditure compared to regular walking (W). No information is available about the effect of NW on ventilatory pattern.Aim: to compare the ventilatory responses of NW to W under field-testing conditions in healthy subjects.Methods: 8 NW trainers (M,age 31-49) were studied by means of portable inductive plethysmography (Lifeshirt, Vivometrics, CA) at rest and during both NW and W at 2 speeds: 3km/h and 5km/h.Subjects performed either W or NW in a randomized manner with 1 hour rest in between.Subjects walked on a level, 420-m track with speed paced by a metronome.We measured minute ventilation (VE), tidal volume (VT), respiratory rate (ƒ), contribution of rib cage to ventilation (RC%) an index of thoracoabdominal coordination (phase angle, Φ°) and Borg scale.Anova test was used for statistical evaluation. Ventilatoy variables during W and NW at 2 speeds Rest W 3km/h W 5km/h NW 3km/h NW 5 km/h VE L/min 10,2±6 23,4±8§ 26,99±8°§ 39,6±18§ * 43,76±18 °§* VT mL 444±240 937±367§ 1042±379°§ 1230±448§* 1446±661§* ƒ 20,6±4 24,8±3§ 26±2§ 32±8§* 31±6§* RC% 53,2±19 49,9±19 50,3±21 53,2±18 51,3±21 Φ ° 17,3±9,1 13,8±4,8 11,8±3 20,7±8,9* 12±9° Borg scale 0 0,6±0,5§ 1,8±1§° 2,5±1,5§* 4,6±1,7§°* * = p<0.05 vs W at the same speed; ° p <0.05 vs same condition at different speed; § vs restResults (mean ±SD): VE, VT, ƒ and Borg scale are significantly higher during NW than W at both speeds. Conclusion: the involvement of ventilation and the perceived exertion are significantly higher during NW than during W; NW might be proposed as a suitable method for respiratory training.
Field testing of ventilatory responses associated with walking and walking with poles(Nordicwalking)
POMIDORI, Luca;COGO, Annaluisa
2008
Abstract
Nordic walking, (NW) is a healthy physical activity reported to significantly increase O2 consumption and energy expenditure compared to regular walking (W). No information is available about the effect of NW on ventilatory pattern.Aim: to compare the ventilatory responses of NW to W under field-testing conditions in healthy subjects.Methods: 8 NW trainers (M,age 31-49) were studied by means of portable inductive plethysmography (Lifeshirt, Vivometrics, CA) at rest and during both NW and W at 2 speeds: 3km/h and 5km/h.Subjects performed either W or NW in a randomized manner with 1 hour rest in between.Subjects walked on a level, 420-m track with speed paced by a metronome.We measured minute ventilation (VE), tidal volume (VT), respiratory rate (ƒ), contribution of rib cage to ventilation (RC%) an index of thoracoabdominal coordination (phase angle, Φ°) and Borg scale.Anova test was used for statistical evaluation. Ventilatoy variables during W and NW at 2 speeds Rest W 3km/h W 5km/h NW 3km/h NW 5 km/h VE L/min 10,2±6 23,4±8§ 26,99±8°§ 39,6±18§ * 43,76±18 °§* VT mL 444±240 937±367§ 1042±379°§ 1230±448§* 1446±661§* ƒ 20,6±4 24,8±3§ 26±2§ 32±8§* 31±6§* RC% 53,2±19 49,9±19 50,3±21 53,2±18 51,3±21 Φ ° 17,3±9,1 13,8±4,8 11,8±3 20,7±8,9* 12±9° Borg scale 0 0,6±0,5§ 1,8±1§° 2,5±1,5§* 4,6±1,7§°* * = p<0.05 vs W at the same speed; ° p <0.05 vs same condition at different speed; § vs restResults (mean ±SD): VE, VT, ƒ and Borg scale are significantly higher during NW than W at both speeds. Conclusion: the involvement of ventilation and the perceived exertion are significantly higher during NW than during W; NW might be proposed as a suitable method for respiratory training.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
