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Sports 2018, 6(2), 44; https://doi.org/10.3390/sports6020044

The Validity of External:Internal Training Load Ratios in Rested and Fatigued Soccer Players

1
Sport Exercise and Health Research Centre, Newman University, Birmingham B323NT, UK
2
Sport Medicine and Science Department, Hull City FC, Kingston Upon Hull HU164HB, UK
3
Spanish Track & Field Royal Association (RFEA), 28008 Madrid, Spain
4
Development & Innovation of Conditioning & Exercise (DICE) Research Group, INEFC Lleida, 25192 Lleida, Spain
5
Faculty of Sports Science, European University of Madrid, 28670 Madrid, Spain
6
Department of Sport, Health and Exercise Science, The University of Hull, Kingston Upon Hull HU67RX, UK
*
Author to whom correspondence should be addressed.
Received: 31 March 2018 / Revised: 11 May 2018 / Accepted: 14 May 2018 / Published: 19 May 2018
(This article belongs to the Special Issue Fatigue and Recovery in Football)
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Abstract

Purpose: To examine the relationship of external:internal training load ratios with fitness and assess the impact of fatigue. Method: Ten soccer players performed a lactate threshold test followed by two soccer simulations (BEAST90mod) 48 h apart. Recovery (TQR) and muscle soreness (DOMS) was measured before each trial. Internal Training load (TL) (iTRIMP) and external load total distance (TD), high intensity distance (HID), PlayerLoad™ (PL) mean metabolic power (MMP) high metabolic power distance (HP) were collected for each trial and external:internal ratios produced. The relationships between ratios and velocity at lactate threshold (vLT) and velocity at Onset of Blood Lactate Accumulation (vOBLA) were examined in both trials along with changes in ratios. Results: Total Quality of Recovery and DOMS showed large changes. There were trivial to large decreases in TL from trial 1 to 2. Moderate increases in ratios for TD:iTRIMP, PL:iTRIMP and MMP:iTRIMP were seen but only small/trivial for HP:iTRIMP and HID:iTRIMP. In rested conditions all ratios show large relationships with vLT and vOBLA. However vLT vs. HID:iTRIMP; PL:iTRIMP; HP:iTRIMP and vOBLA vs. TD:iTRIMP; PL:iTRIMP; MMP:iTRIMP became weaker under fatigue. Conclusions: Acute changes in the ratios have implications forthe use of ratios as fitness measures but also as indicators of fatigue. View Full-Text
Keywords: fitness; heart rate; TRIMP; GPS (Global Positionining Systems); PlayerLoad; metabolic power; team sports; monitoring fitness; heart rate; TRIMP; GPS (Global Positionining Systems); PlayerLoad; metabolic power; team sports; monitoring
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Akubat, I.; Barrett, S.; Sagarra, M.L.; Abt, G. The Validity of External:Internal Training Load Ratios in Rested and Fatigued Soccer Players. Sports 2018, 6, 44.

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