The Relationship Between Cardiorespiratory and Accelerometer-Derived Measures in Trail Running and the Influence of Sensor Location.

Staunton, Craig A; Swarén, Mikael; Stöggl, Thomas; Born, Dennis; Björklund, Glenn (2022). The Relationship Between Cardiorespiratory and Accelerometer-Derived Measures in Trail Running and the Influence of Sensor Location. International Journal of Sports Physiology and Performance, 17(3), pp. 474-483. Human Kinetics 10.1123/ijspp.2021-0220

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Purpose: To examine the relationship between cardiorespiratory and accelerometer-derived measures of exercise during trail running and determine the influence of accelerometer location. Methods: Eight trail runners (7 males and 1 female; age 26 [5] y; maximal oxygen consumption [V˙O2] 70 [6] mL·kg-1·min-1) completed a 7-km trail run (elevation gain: 486 m), with concurrent measurements of V˙O2, heart rate, and accelerations recorded from 3 triaxial accelerometers attached at the upper spine, lower spine, and pelvis. External exercise intensity was quantified from the accelerometers using PlayerLoad™ per minute and accelerometry-derived average net force. External exercise volume was calculated using accumulated PlayerLoad and the product of average net force and duration (impulse). Internal intensity was calculated using heart rate and V˙O2-metrics; internal volume was calculated from total energy expenditure (work). All metrics were analyzed during both uphill (UH) and downhill (DH) sections of the trail run. Results: PlayerLoad and average net force were greater during DH compared with UH for all sensor locations (P ≤ .004). For all accelerometer metrics, there was a sensor position × gradient interaction (F2,1429.003; P <.001). The upper spine was lower compared with both pelvis (P ≤ .003) and lower spine (P ≤ .002) for all accelerometer metrics during both UH and DH running. Relationships between accelerometer and cardiorespiratory measures during UH running ranged from moderate negative to moderate positive (r = -.31 to .41). Relationships were stronger during DH running where there was a nearly perfect correlation between work and impulse (r = .91; P < .001). Conclusions: Simultaneous monitoring of cardiorespiratory and accelerometer-derived measures during trail running is suggested because of the disparity between internal and external intensities during changes in gradient. Sensor positioning close to the center of mass is recommended.

Item Type:	Journal Article (Original Article)
Division/Institute:	Swiss Federal Institute of Sports Magglingen SFISM > EHSM - Leistungssport > Trainingswissenschaft
Name:	Staunton, Craig A; Swarén, Mikael; Stöggl, Thomas; Born, Dennis0000-0002-1058-4367 and Björklund, Glenn
ISSN:	1555-0265 (Print) 1555-0273 (Online)
Publisher:	Human Kinetics
Language:	English
Submitter:	Sabina Wolfensberger
Date Deposited:	30 Jun 2023 08:45
Last Modified:	30 Jun 2023 08:45
Publisher DOI:	10.1123/ijspp.2021-0220
Related URLs:	Publication
PubMed ID:	34983018
Uncontrolled Keywords:	Athlete Hilly terrain IMU Inertial measurement unit Undulating terrain Leistungssport Trainingswissenschaft
URI:	https://arbor.bfh.ch/id/eprint/19334