HIIT 4x4 Lite 4+

Name: HIIT 4x4 Lite
Author: Eastridge Technology

Interval Training Meter

Eastridge Technology

Designed for iPhone

- Free

Description

HIIT 4x4 Lite is an Apple Watch exercise monitoring app for High Intensity Interval Training (HIIT). The app sequences exercise between high and low intensity intervals. The intensity of the exercise is measured as a percentage of your Maximum Heart Rate (MHR).

The HIIT 4x4 intervals are as follows:

- 10 minutes warmup at 60% MHR
- 4 minutes high intensity at 90% MHR
- 3 minutes low intensity at 70% MHR
- repeat high-low intervals 4 times (4 high intensity intervals of 4 minutes each = 4x4).

HIIT 4x4 Lite uses a speedometer type dial to display heart rate. When the arrow is in the green zone then your heart rate is within the interval target. If the heart rate later falls out of the target range, warning chimes are issued until back in range.

Each person's MHR is different, and changes with age. A commonly used formula for MHR is 220 - age in years. A more accurate number can be discovered by using a heart monitor during all out exercise and observing the highest heart rate achieved.

HIIT 4x4 Lite does NOT store your workout history using Apple Health. Please use the full version HIIT 4x4 (not Lite) to store workout history.

HIIT 4x4 Lite is based on the High Intensity Interval Training 4x4 program developed by the Norwegian University of Science and Technology's Cardiac Exercise Group.

22 Sept 2024

Version 1.08

The Start button was moved to the Settings screen to streamline operation.

The developer, Eastridge Technology, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.