King Grub
2017-02-21, 08:26
BACKGROUND:
We have investigated the effect using walking poles and pulling tyres at 4 and 6 km·h-1 (1.11 and 1.67 m·s-1) speeds on oxygen uptake (V̇ O2) and heart rate.
METHODS:
Twelve subjects, 6 males, with a mean (SD) age of 25.2(6.9) years participated in field tests involving walking without poles, walking with poles and tyre pulling with poles.
RESULTS:
Increasing the load caused the largest increases in energy demand, more than 4 MET. Speed increase also caused substantial energy increase, approx. 4 MET. Increasing the inclination only modestly increased the oxygen uptake, approx. 2 MET. In both level walking and uphill walking, using poles marginally increased oxygen uptake compared to working without poles. Pulling one tyre (12.5 kg) required an oxygen uptake of 27 (4) ml·kg-1·min-1 at 4 km·h-1 and 0% inclination. Adding one more tyre (6 kg) drove the oxygen uptake further up to 39 (4) ml·kg-1·min-1. This is close to the requirement of level running at 10.5 km·h-1. Pulling both tyres at 6 km·h-1 and 5% inclination required a V̇ O2 of 54 (6) ml·kg-1·min-1, equal to running uphill at 5 % inclination and 12.5 km·h-1 speed. Heart rate rose comparably with oxygen uptake. At 4 km·h-1 and 0% inclination the increase was 29 bpm, from 134 (21) to 163 (22) bpm when going from pulling one tyre to two tyres. In the hardest exercise, 6 km·h-1 and 5% inclination, heart rate reached 174 (14) bpm.
CONCLUSIONS:
The study showed that tyre pulling even at slow speeds has an energy requirement that is so large that the activity may be feasible as endurance training.
J Sports Med Phys Fitness. 2017 Feb 14. Energy requirements of tyre pulling.
http://www.minervamedica.it/en/journals/sports-med-physical-fitness/article.php?cod=R40Y9999N00A17021405
We have investigated the effect using walking poles and pulling tyres at 4 and 6 km·h-1 (1.11 and 1.67 m·s-1) speeds on oxygen uptake (V̇ O2) and heart rate.
METHODS:
Twelve subjects, 6 males, with a mean (SD) age of 25.2(6.9) years participated in field tests involving walking without poles, walking with poles and tyre pulling with poles.
RESULTS:
Increasing the load caused the largest increases in energy demand, more than 4 MET. Speed increase also caused substantial energy increase, approx. 4 MET. Increasing the inclination only modestly increased the oxygen uptake, approx. 2 MET. In both level walking and uphill walking, using poles marginally increased oxygen uptake compared to working without poles. Pulling one tyre (12.5 kg) required an oxygen uptake of 27 (4) ml·kg-1·min-1 at 4 km·h-1 and 0% inclination. Adding one more tyre (6 kg) drove the oxygen uptake further up to 39 (4) ml·kg-1·min-1. This is close to the requirement of level running at 10.5 km·h-1. Pulling both tyres at 6 km·h-1 and 5% inclination required a V̇ O2 of 54 (6) ml·kg-1·min-1, equal to running uphill at 5 % inclination and 12.5 km·h-1 speed. Heart rate rose comparably with oxygen uptake. At 4 km·h-1 and 0% inclination the increase was 29 bpm, from 134 (21) to 163 (22) bpm when going from pulling one tyre to two tyres. In the hardest exercise, 6 km·h-1 and 5% inclination, heart rate reached 174 (14) bpm.
CONCLUSIONS:
The study showed that tyre pulling even at slow speeds has an energy requirement that is so large that the activity may be feasible as endurance training.
J Sports Med Phys Fitness. 2017 Feb 14. Energy requirements of tyre pulling.
http://www.minervamedica.it/en/journals/sports-med-physical-fitness/article.php?cod=R40Y9999N00A17021405