Goals
- Motivate the user by showing them how their body is responding to exercise.
- Show the user what their physiological response is right now and how it changes over time.
- Display the physiological response they can expect to get from a specific Workout Definition.
- Display the total response they got from completing a Workout Activity
Background and strategic fit
The core feature of Afterburner is to show the user how their body responds to various types of workout. In reality, our bodies respond in many different ways, making us fitter and more healthy. In Afterburner we group these physiological responses into four:
- EPOC (Excess Post-exercise Oxygen Consumption): after intense exercise, your body must replenish the (phosphocreatine, ATP and glycogen) energy stores that were used up during the workout. This causes you to burn calories for a period after exercise. This increased calorie-burn causes you to consume more oxygen and this is how the effect is measured in a lab. The effect is very strong immediately after exercise but tails off quickly to a low level that can last for a couple of days.
- Strength adaptions: putting your muscles under 'exercise stress' creates micro-tears and causes them to adapt by strengthening themselves. This process is called muscular hypertrophy and can occur for up to 72 hours after exercise. Exercises that put a high resistance on a muscle cause a greater physiological response.
- Cardio (aerobic) adaptions: in the same way, putting your heart and cardiovascular system under exercise stress cause them to adapt and strengthen. Your heart muscles get stronger and bigger (cardio hypertrophy) and are able to pump more blood per second; veins and arteries get bigger and are able to handle more blood per second; lung capacity increases as they grow more alveoli and are able to pass more oxygen into the blood.
- Metabolic adaptions: as fitness increases, your body is able to burn fat more efficiently. This means fat can be used as the primary fuel at higher exercise intensities, making it easier for you to burn even more fat. The body also becomes better at regulating hormones such as insulin and ghrelin. These are the hormones that govern the body's fat storage mechanisms.
Assumptions
Requirements
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User interaction and design
Questions
Below is a list of questions to be addressed as a result of this requirements document:
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