Body Frame Size Calculator

def body_frame_size(height_cm, wrist_cm, gender):
    """
    Determine body frame size from height and wrist circumference.
    Returns: 'small', 'medium', or 'large'
    """
    r = height_cm / wrist_cm
    if gender == "male":
        if r > 10.4:
            return "small"
        elif r < 9.6:
            return "large"
        else:
            return "medium"
    else:  # female
        if r > 11.0:
            return "small"
        elif r < 10.1:
            return "large"
        else:
            return "medium"

def ideal_weight_hamwi(height_cm, gender, frame):
    """Hamwi formula for ideal body weight in kg"""
    height_in = height_cm / 2.54
    if gender == "male":
        ibw = 48 + max(0, height_in - 60) * 2.7
    else:
        ibw = 45.5 + max(0, height_in - 60) * 2.2
    adj = {"small": -0.10, "medium": 0, "large": 0.10}[frame]
    return ibw * (1 + adj)

# Example
height, wrist = 175, 17
gender = "male"
frame = body_frame_size(height, wrist, gender)
ibw = ideal_weight_hamwi(height, gender, frame)
print(f"Frame: {frame}, Ideal weight: {ibw:.1f}kg")