Discussion
chronic obstructive lung disease, fatigue, dyspnoea
CHRONIC OBSTRUCTIVE LUNG DISEASE
We report on the first study comparing 1MSTST performance from a standardised starting position (i.e., 46 cm seat height) versus an individualised starting position (i.e., starting with a knee flexion angle of 90°) in healthy participants. We found that the individualised 1MSTST led to a significant increase in repetitions compared to the standardised 1MSTST. As hypothesised, 1MSTST performance was explained by morphology (i.e., tibia and femur length). Our investigation showed that the individualised 1MSTST controls for the effect of tibia length on performance.In our study, participants achieved an average of 12 more repetitions in the individualised 1MSTST than in the standardised 1MSTST. There was significant influence of both femur and tibia length on performance. However, the individualised 1MSTST is only able to control for length differences in the tibia. Thus, the difference between the modalities is explained by controlling for tibia length differences. Accordingly, our findings confirm previous hypotheses based on biomechanical investigations (Takai et al. Acute physiological responses (i.e., heart rate and SpOOur conclusion on the ability of participants to elicit maximal performance in both 1MSTST modalities was supported by the subjective ratings on the modified Borg scale. While sensations of dyspnoea were largely similar between the standardised and the individualised 1MSTST, there was a tendency towards lower sensations of leg fatigue in the individualised 1MSTST. This difference might be clinically relevant and would thus require confirmation in further studies.It is well known that 1MSTST performance is associated with knee extension strength (Bohannon and Crouch This study has some limitations. (i) We applied convenience sampling, resulting in a young sample with a high overall 1MSTST repetition count. Very recent work investigating people with chronic obstructive lung disease implies that the effects are attenuated when the repetition count is lower (Zumbrunnen et al. 