FITIV Pulse
4.6 stars4.6 · 21,000+ reviews · 2M+ downloads

Train smarter.Know the science.

Evidence-based guides on HRV, Zone 2, training load, VO2 max, and recovery, written for data-driven athletes.

Training Guides

14 results

Apple Watch Complications: What They Are and the Best for Fitness

What Apple Watch complications are, how to add them on your watch or iPhone, which faces hold the most, and the best ones for fitness, including FITIV's.

FITIV Team

11 min read

Apple Watch Cardio Fitness Low: What It Means and How to Raise It

Apple Watch says your Cardio Fitness is Low or Below Average? Here's what the level means, how accurate the VO2 max estimate is, and how to raise it.

FITIV Team

14 min read

Apple Watch Vitals App: What Your Outliers Are Telling You

How the Apple Watch Vitals app sets your typical range, what one or two outliers can mean, when to see a doctor, and how FITIV tracks the same vitals.

FITIV Team

13 min read

Best Bluetooth Heart Rate Monitors for iPhone & Apple Watch

The best Bluetooth heart rate monitors for iPhone and Apple Watch: chest straps vs armbands, what research says about accuracy, and how each works with FITIV.

FITIV Team

13 min read

What Is a Good HRV on Apple Watch? Normal Ranges by Age

A good Apple Watch HRV is one near your own baseline. See typical SDNN by age, why it won't match WHOOP or Oura, why it's low today, and how FITIV tracks it.

FITIV Team

12 min read

What Are METs and MET Minutes? A Guide to Exercise Intensity

METs measure exercise intensity as a multiple of your resting energy use. Learn how MET minutes work, how many you need weekly, and how FITIV Points use them.

FITIV Team

10 min read

GLP-1 Muscle Loss: How to Keep Muscle on Ozempic & Mounjaro

How much muscle people lose on GLP-1s like Ozempic, Wegovy, Mounjaro, and Zepbound, and how protein, strength training, and pace protect it.

FITIV Team

8 min read

FTP Test Guide: How to Test Your Functional Threshold Power

Learn how to test your FTP with the 20-minute protocol or ramp test. Set accurate power zones and use FTP to structure cycling training in FITIV Pulse.

FITIV Team

11 min read

Heart Rate Zones Explained: Training in Zones 1–5

Understand all five heart rate training zones, how to calculate your max HR, and how polarized training works. Set up zones in FITIV Pulse for smarter workouts.

FITIV Team

12 min read

HRV Training Guide: Use Heart Rate Variability to Train Smarter

Learn how to use HRV (heart rate variability) to guide training intensity, avoid overtraining, and maximize fitness adaptation with daily readiness tracking.

FITIV Team

11 min read

How to Improve VO2 Max: Evidence-Based Training Guide

Improve your VO2 max with proven training methods: Zone 2 base work, 4x4 intervals, and threshold sessions. Includes ranges by age and how to track progress.

FITIV Team

12 min read

Recovery Guide: Avoid Overtraining and Optimize Adaptation

Supercompensation, signs of overtraining, and the recovery methods that work. Use FITIV's Recovery score to manage your training load.

FITIV Team

13 min read

Training Load Explained: TRIMP, TSS, and RPE for Athletes

Understand training load metrics (TRIMP, TSS, CTL, ATL, and TSB) and how to use them to build fitness, prevent overtraining, and peak for races with FITIV.

FITIV Team

14 min read

Zone 2 Training: The Complete Guide to Aerobic Base Building

Zone 2 training builds the aerobic engine every serious athlete needs. Learn heart rate targets, how much to do, and how to track it with FITIV Pulse.

FITIV Team

12 min read