Calculation of Training VO2:

Given: Weight of the man = 75 kg, Cycling power output = 120 watts

To calculate the Training VO2, we can use the following equation:

VO2 (mL/kg/min) = (Power output (W) / Weight (kg)) * 10.8

VO2 = (120 watts / 75 kg) * 10.8

VO2 = 17.28 mL/kg/min

Therefore, the Training VO2 is approximately 17.06 mL/kg/min. (Option b)

Calculation of Energy Expenditure:

Given: Duration of the ride = 30 minutes

To calculate the Energy Expenditure, we can use the following equation:

Energy Expenditure (kcal) = METs * Weight (kg) * Time (hours)

METs can be estimated using the following formula:

METs = VO2 (mL/kg/min) / 3.5

METs = 17.06 mL/kg/min / 3.5

METs = 4.88

Energy Expenditure = 4.88 * 75 kg * (30 minutes / 60)

Energy Expenditure = 9.2 kcal

Therefore, the Energy Expenditure during the 30-minute ride is approximately 9.2 kcals. (Option b)

Appropriate Walking Speed on a 10% Grade:

To determine the appropriate walking speed, we need to refer to a MET-speed table. According to the table, walking on a 10% grade requires an average speed of 100 m/min.

Therefore, the appropriate walking speed on a 10% grade is 100 m/min. (Option d)

Calculation of Energy Expenditure during Aerobic Dance Class:

Given: Weight of Lisa = 58 kg, Step rate = 20 steps per minute, Duration = 20 minutes

To calculate the Energy Expenditure, we can use the following equation:

Energy Expenditure (kcal) = METs * Weight (kg) * Time (hours)

METs for aerobic dance class can be estimated as 6.

Energy Expenditure = 6 * 58 kg * (20 minutes / 60)

Energy Expenditure = 116 kcal

Therefore, Lisa will expend approximately 116 kcals in 20 minutes. (Option d)

Equivalent Work Rate on the Leg Ergometer:

Given: Power output on the leg ergometer = 120 watts

To calculate the Equivalent Work Rate, we need to convert watts to kg/m/min.

Equivalent Work Rate = Power output (watts) * 3.6 kg / m / min

Equivalent Work Rate = 120 watts * 3.6 kg / m / min

Equivalent Work Rate = 432 kg / m / min

Therefore, the Equivalent Work Rate on the leg ergometer is 432 kg / m / min. (Option d)

Calculation of VO2 during Running on a Level Track:

Given: Weight of the male = 80 kg, Running speed = 9 mph

To calculate the VO2, we can use the following equation:

VO2 (mL/kg/min) = (0.1 * Speed (mph) + 3.5) * Weight (kg) / 3.5

VO2 = (0.1 * 9 mph + 3.5) * 80 kg / 3.5

VO2 = 42.3 mL/kg/min

Therefore, the VO2 during running on a level track is approximately 42.3 mL/kg/min. (Option d)

Calculation of Calories per Minute Expenditure:

To calculate the Calories per Minute Expenditure, we can use the following equation:

Calories per Minute = VO2 (mL/kg/min) * Weight (kg) / 1000

Calories per Minute = 42.3 mL/kg/min * 80 kg / 1000

Calories per Minute = 3.38 kcals/min

Therefore, the man is expending approximately 3.38 kcals per minute. (Option c)