Continuous Versus Intermittent Running: Acute Performance Decrement and Training Load

Kesisoglou, Antonis; Nicolò, Andrea; Howland, Lucinda; Passfield, Louis

doi:10.1123/ijspp.2020-0844

Cited by 6 publications

(5 citation statements)

References 32 publications

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“…When we examined experimentally the underpinning of the model, which relates a training dose to its fatigue or APD element, our findings suggested that commonly used TL metrics do not quantify the training dose effectively. 3,16,20 Although we agree with our colleagues that these findings may not directly challenge the validity of the TL concept, they do question the validity of the TL metrics evaluated-when TL is conceptualized as a training dose. The validity of TL metrics as a representation of the training dose remains untested.…”

supporting

confidence: 68%

Training Load: Differentiating Training Volume and Training Dose

Passfield

Murias

Sacchetti

et al. 2022

International Journal of Sports Physiology and Performance

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We would like to thank our colleagues who have written to comment 1,2 on our recent review about the validity of the training load (TL) concept, 3 particularly given their extensive previous scientific and practical contributions on this topic. We are pleased to have the opportunity to extend discussion of the topic further in this reply. We suspect that how TL is conceptualized may lead to important differences in perspective as we find ourselves in broad agreement with several of the points raised in both letters. Therefore, we will respond by briefly outlining our interpretation of the TL concept and the rationale for linking this to an acute performance decrement (APD) and then addressing some specific points that were raised.Most discussions of the concept of TL begin with the seminal work of Banister et al, 4 who proposed that training-induced fatigue could be linked to subsequently observed gains in performance (fitness). Banister's work was based on fundamental principles of training theory, 5,6 and therefore, we conceptualized the TL in the same manner but as a single training dose. The principles of training theory propose that a training session constitutes an overload that causes a training stress and fatigue, which, in turn, provides a signal for adaptation or overcompensation that occurs during the ensuing recovery period (Figure 1). The training session is considered a training dose, and the resultant training adaptations increase fitness and enhance performance. Indeed, the representation of this training process is often described by its effects on performance, that is, an APD occurs in response to the training dose, and then in recovery, performance is restored progressively to an augmented level (Figure 1). Banister et al's 4 thesis was that chronic changes in performance could be modeled as the integrated effects of training fatigue and fitness. As benefits to performance Passfield

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supporting

confidence: 68%

Training Load: Differentiating Training Volume and Training Dose

Passfield

Murias

Sacchetti

et al. 2022

International Journal of Sports Physiology and Performance

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“…The NASA Task Load Index has been little used in the context of sport monitoring but showed good agreement with the APD observed following cycling sessions 9 ; it performed better than other TL metrics in the variable intensity running study. 10 Although sRPE contradicts APD, we have found end-exercise RPE scores to show good agreement with APD when measured both as TT 10 and TTF. 8 In the latter study, we reported a strong correlation for minute ventilation ( VE ), recorded at the end of exercise, with subsequent TTF.…”

Section: Practical Applicationsmentioning

confidence: 59%

“…The relationship between exercise intensity and athlete stress is inherently nonlinear and some TL metrics attempt to account for this. 12,21,22 However, reasonable agreement with APD was still not found 9,10 and may be confounded by the influence of the structure of the training session. 29,32,33 Accordingly, further research may be required to determine how TL metrics can capture and present information on session structure by, for example, exploring methods such as exposure variation analysis.…”

Section: Practical Applicationsmentioning

confidence: 98%

“…The confounding effect of exercise duration is particularly evident in 2 studies of training sessions where we manipulated TL to compare explicitly the agreement of various TL metrics with APD. 9,10 The first of these studies was conducted in the laboratory using well-trained cyclists. We examined APD measured as a 5-minute TT after maximal session efforts of 5 and 20 minutes, and after submaximal session efforts of 20 and 40 minutes.…”

Section: Acute Performance Decrement and Tlmentioning

confidence: 99%

“…Underlining this concern are recent findings from our research groups that demonstrated circumstances where the calculated TL does not reflect the overall stress of the session and is therefore unlikely to represent its training dose. [8][9][10][11] Accordingly, the purpose of this brief review is to highlight the issues associated with the validity of the TL concept, and to suggest some directions for future research and practical implementation.…”

mentioning

confidence: 99%

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Validity of the Training-Load Concept

Passfield¹,

Murias²,

Sacchetti³

et al. 2022

International Journal of Sports Physiology and Performance

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Training load (TL) is a widely used concept in training prescription and monitoring and is also recognized as as an important tool for avoiding athlete injury, illness, and overtraining. With the widespread adoption of wearable devices, TL metrics are used increasingly by researchers and practitioners worldwide. Conceptually, TL was proposed as a means to quantify a dose of training and used to predict its resulting training effect. However, TL has never been validated as a measure of training dose, and there is a risk that fundamental problems related to its calculation are preventing advances in training prescription and monitoring. Specifically, we highlight recent studies from our research groups where we compare the acute performance decrement measured following a session with its TL metrics. These studies suggest that most TL metrics are not consistent with their notional training dose and that the exercise duration confounds their calculation. These studies also show that total work done is not an appropriate way to compare training interventions that differ in duration and intensity. We encourage scientists and practitioners to critically evaluate the validity of current TL metrics and suggest that new TL metrics need to be developed.

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