What types of exercise are referred to when the Styku software says "2 times per week" and "moderate exercise", for example?

The Fitness Tab's goal-setting feature uses the activity levels described by the Revised Harris-Benedict equation to determine a caloric expenditure and goal date.

The Fitness Tab allows a trainer to set a workout goal for his/her client. The "Workouts per Week" slider ranges from 0 workouts and a Sedentary activity level to 7 weekly workouts and a Very Heavy Exercise activity level. But what kinds of exercise count as "Heavy" or "Light" exercise?

The Fitness Tab relies on the Revised Harris-Benedict Equation (1984) for its prediction of caloric expenditure at different activity levels. Examples of what kind of activity constitutes an activity level according to Harris-Benedict are listed below (Source) :

0 Workouts/Week - Sedentary

Little to no regular exercise. 

1-2 Workouts/Week - Light Exercise

Intensive exercise for at least 20 minutes 1 to 3 times per week. This may include such things as bicycling, jogging, basketball, swimming, skating, etc.  If you do not exercise regularly, but you maintain a busy life style that requires you to walk frequently for long periods, you meet the requirements of this level. 

3-4 Workouts/Week - Moderate Exercise

Intensive exercise for at least 30 to 60 minutes 3 to 4 times per week. Any of the activities listed above will qualify.

5-6 Workouts/Week - Heavy Exercise

Intensive exercise for 60 minutes or greater 5 to 7 days per week (see sample activities above).  Labor-intensive occupations also qualify for this level.  Labor-intensive occupations include construction work (brick laying, carpentry, general labor, etc.). Also farming, landscape worker or similar occupations.

7 Workouts/Very Heavy Exercise

Exceedingly active and/or very demanding activities:  Examples include:  (1) athlete with an almost unstoppable training schedule with multiple training sessions throughout the day  (2) very demanding job, such as shoveling coal or working long hours on an assembly line. Generally, this level of activity is very difficult to achieve.