Firstbeat features (12)
VO2max Fitness Level
Your true fitness level and key to personalized training guidance.Read more
Accurate calorie counts for daily life, top performance, and everything in between.Read more
Training Effect: Aerobic
Reveal the physiological impact of your activities to find the perfect training for you.Read more
Training Effect: Anaerobic
Unlock the secrets of top-performance in activities with high-intensity demands.Read more
Recovery Time Advisor
Ensure adequate recovery to reap the full reward of your efforts.Read more
Keep track of the physiological impact of all your training activities over time.Read more
A groundbreaking approach to training effectiveness evaluation.Read more
Real-Time Performance Condition
See how you are doing and gain insight along the way.Read more
Your ultimate guide to endurance training and personalized training zones.Read more
Functional Threshold Power (FTP)
See power output above which fatigue will build rapidly and plan accordingly.Read more
Quick Stress Level Test
Gain access to the level of physiological stress in your body.Read more
All-day Stress & Recovery
Reveal how your body responds to the challenges of life and environment.Read more
Designed for professionals and anyone needing tactical functionality in a wearable form, the tactix Charlie has everything needed for these operations and everyday life. Building on the popularity of the tactix Bravo and the fēnix 5X, the new tactix Charlie blends the best of both wearables to offer tactical and multisport features, enhanced mapping, and wrist-based heart rate in one watch.
Ruggedly constructed to withstand whatever comes, the tactix Charlie relies on the Firstbeat analytics engine to deliver insight into the physiological impact of activities, life, and environment.
Aerobic and Anaerobic Training Effects reveal the specific impact of activity sessions, while Training Load reveals the big picture. Training Status offers insight by placing activity into the context of changes in cardiorespiratory fitness. Meanwhile, All-day Stress let’s you know about the rest of your day, and will help you pinpoint daily activities, routines, and lifestyle choices that – if unmanaged in the long-term – may impact your health and personal well-being.