Table 2. Protocol of the test. ‘Load’ denotes the assigned load for each phase/stage. An empty cell denotes that no load was imposed during this phase of the test. HR_60%, HR_80% and HR_90% represent the according percentage of the self-reported maximal heart rate. ‘Acoustic’ and ‘Visual’ show the signals for the beginning of the start. ‘Timeout’ denotes that the ‘Time remaining’ (c.f. Figure 1) has exceeded, i.e. displayed ‘00:00.0’ before switching to the next phase.

Duration	Phase	Load	Acoustic	Visual
10 s	Initial		Small chainring
6 min	HR stage 1	HR60% ± 2	Go
6 min	HR stage 2	HR80% ± 1	Large chainring	Timeout
3 min	HR stage 3	HR90% ± 1		Timeout
90 s	Rest stage		Sit up and relax	Timeout
30 s			Start pedaling	Popup open
3 min	Power stage	Avg. power of HR stage 3		Popup close
	End			Timeout