Algorithm 2 Algorithm for individual scaling of heart rate values.

 

Data: P:= number of participants

T:= number of time points (length of exercise)

SHR(p,t):= matrix of heart rate for all participants

[[S1,1, …, S1,t, …,S1,T]

[Sp,1, …, Sp,t, …,Sp,T]

[SP,1, …, SP,t, …,SP,T]]

HRMAX(p):= list of maximum heart rates for participants

[HRMAX(1), …, HRMAX(p), …, HRMAX(P)]

Result: SScaledHR(p,t):= matrix of scaled heart rate for all participants

[[S1,1, …, S1,t, …,S1,T]

[Sp,1, …, Sp,t, …,Sp,T]

[SP,1, …, SP,t, …,SP,T]]

1 for participant in range(1..P) do

2  low:= HRMAX(p)/2;

3  high:= HRMAX(p);

4  for t in range(1..T) do

5   SScaledHR(participant, t):= (SHR(participant, t) - low) / (high - low);

6   if SScaledHR(participant, t) ≥ high then SScaledHR(participant, t):= high;

7   if SScaledHR(participant, t) ≤ min then SScaledHR(participant, t):= min;

8  end

9 end