exertiontracker.py

# user inputs
age = int(input("Enter your age: "))
target_intensity = float(input("Target intensity (0-1): "))

# calibration ??
print("\nCalibrating resting heart rate...")
resting_hr_samples = []

for i in range(40):
    hr = float(input(f"Resting HR sample {i + 1}: "))
    resting_hr_samples.append(hr)

resting_hr = sum(resting_hr_samples) / len(resting_hr_samples)
max_hr = 220 - age

print(f"\nResting HR = {resting_hr:.1f} bpm")
print(f"Estimated Max HR = {max_hr} bpm\n")

# functions
def karvonen_target_hr(intensity, resting_hr, max_hr):
    return resting_hr + intensity * (max_hr - resting_hr)

def heart_rate_intensity(current_hr, resting_hr, max_hr):
    return (current_hr - resting_hr) / (max_hr - resting_hr)

def temperature_status(current_temp, baseline_temp):
    delta = current_temp - baseline_temp
    if delta >= 2.5:
        return "DANGER"
    elif delta >= 1.5:
        return "WARNING"
    else: 
        return "NORMAL"
    
# exercise loop
baseline_temp = float(input("Baseline wrist temperature (C): "))

current_hr = float(input("\nCurrent HR: "))
current_temp = float(input("Current wrist temp (C): "))

target_hr = karvonen_target_hr(target_intensity, resting_hr, max_hr)
intensity = heart_rate_intensity(current_hr, resting_hr, max_hr)
temp_state = temperature_status(current_temp, baseline_temp)

print("\nFEEDBACK")

if current_hr < target_hr * 0.9:
    print("Increase intensity!")
elif current_hr > target_hr * 1.1:
    print("Ease up slightly")
else:
    print("You are in your target zone")

if current_hr >= max_hr:
    print("WARNING: HR exceeds estimated max")

if temp_state == "WARNING":
    print("Temp rising fast")
elif temp_state == "DANGER":
    print("STOP: Overexertion risk")