FAQ

In principle: yes! If you want to exercise effectively and efficiently, an interval training is the way to go. Your fitness level does not matter.

You need a heart rate monitor so that the app can use your heart rate in calculations to deliver you the optimal interval training. Please make sure that the heart rate monitor you would like to use is supported.

In principle every Bluetooth Smart / Bluetooth Low Energy (LE) / Bluetooth 4.0 heart rate monitor should work. That means that activity trackers will generally not work, because they don't have a function to broadcast your heart rate over these Bluetooth protocols. Only the more/most expensive ones may have that capability. The most accurate heart rate monitors are chest straps, which use electrocardiography (ECG) to measure the heart rate. Optical heart rate monitors will also work, but are less (sometimes much less) accurate. During development the app is tested with the Wahoo Tickr (ECG chest strap) and the Polar OH1+ (optical arm strap), which both come recommended. Users have reported successful usage with a Polar H10 chest strap.

Anytime you feel like it. If you allow your body to recover for 48 hours from each interval training session before starting a new one, you can use it as often as you like. The more often you use it, the sooner you should see and feel results. A scientific study has shown that with an interval session only once a week for four weeks positive effects could already be measured.

You could, but that's not advisable. An interval training is in general quite exhaustive and puts strain on the body. This is desired, because the body recovers to a stronger state than before the training. This is needed to gain positive training effects by building on the gradual increase of recovering to a fitter state. However, that also means that you can overdo it, which has an adverse effect. Therefore, it is advised to wait at least 48 hours to let your body completely recover from an interval training before starting a new interval training.

First of all, check to see whether you have correctly filled in the Personal Setup pages (your age, height, weight, activity habits, etc.). Be certain that your birthday is correct, because mainly your age determines your heart rate properties. The training session defaults are estimated based on your fitness but they could be too optimistic or too easy for you. It is just a proposal to help you set up a session and get you going quickly. You are free to change every detail to adapt the session to your wishes. Start with reducing the oxygen uptake (V'O2) target level and try what works for you. When your fitness improves, you can set higher targets.

Possibly due to a warming up which did not activate your body enough. A warming up should allow the body to prepare itself for intense exercise. Not only the muscles should get warm to prevent musculoskeletal injuries, also the metabolism systems should be activated so the body can make use of them. That means one should ideally perform a warming up of around/at least 10 minutes to allow the aerobic system to be turned on. Make sure to include some very short sprints to activate the anaerobic system.

Yes, you can. The app makes use of notifications to indicate when intervals change. These notifications allow you to skip the current interval, pause and resume the training, or stop the training completely. That way you can leave your phone in your pocket while exercising, and control the training easily using your watch! However, you cannot use the heart rate monitoring function of your smart watch due to limitations imposed by the manufacturers. On some models it works out-of-the-box, but they tend to be the more/most expensive ones. Try to look for something resembling a "bluetooth broadcasting" function.

Make sure you heart rate monitor is switched on (often done by starting to wear it), and that it is in pairing mode (often automatically immediately after it has switched on). Also make sure your heart rate monitor is supported. In principle every Bluetooth Smart / Bluetooth Low Energy (LE) / Bluetooth 4.0 heart rate monitor should work. That means that activity trackers will generally not work, because they don't have a function to broadcast your heart rate over these Bluetooth protocols. Only the more/most expensive ones may have that capability.

There is a problem connecting to a heart rate monitor when a connection has already been made to another app. Disconnect from all apps (close the apps and remove them from your recent apps menu) and then make sure that you first connect to your heart rate monitor in HIIT to get.fit. After that you can connect your heart rate monitor in others apps as well if you like (for instance for tracking your activity using GPS, or to connect to some fitness equipment, etc.).

You may have paired the heart rate monitor to your phone via the Android Bluetooth settings. This is not necessary and, in fact, can give problems. You can directly connect to the heart rate sensor from within HIIT to get.fit, without separately registering or pairing to your phone. If you have paired the sensor with your phone before, please go into the Bluetooth settings to "forget" the sensor, and try to connect from within HIIT to get.fit.

This may have to do with a Bluetooth caching issue in the operating system. Try to uninstall the app, let Android or iOS forget the sensor if it has saved it, then reinstall the app and try to connect again.