Full and Final Review

Initial Impressions and Overview Review

2 Week of Use Review

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Optical Heart Rate Accuracy

Workout 1 - UIM #4 & 5 

The Coros held up relatively well for the first workout out of the gate - the heart rate at 93.7% of top Heart Rate Zone and 96% of Heart Rate Average.  It also strangely compared well to the Garmin Training Effect and Recovery Amounts.

Workout 2 - UIM #6

The Coros faltered a bit on HR accuracy on this one - picking up 93% of the HR average but only 62% of the HR Zone 5 time.

Workout 3 - UIM #7

The Coros reallly fell flat on this workout - 65% accuracy on the HR Average and 0% of Zone 5 time.  It also highly affected the workout output calculations and Load addition.

Workout 4 - Double Unders, Burpees, and Back Squats

This was Workout #2 from Support Your Box online competition - Declining Double Unders and Burpees - followed by Back Squats for 4:00.  The Coros caught 92% accuracy on Average HR, but only 22% of Zone 5 time, thus leading it to under-calculate the Load and Workout Output.
Recovery Time:
- Coros:  9.7 hours
- Garmin:  21 hours
- Polar:  7 hours

Workout 5 - Karen and Annie

The Coros HR fell short in this workout - only capturing 84% of the Average Heart Rate, and 57% of the Zone 5 time. 
Recovery Time -
- Coros: 12.5 hours 
- Garmin: 40 hours
- Polar: 12 hours

Mountain Biking Workout

Workout Output/Evaluation Comparison

***All of the Following are with All Testing Units paired to the same Chest Strap for Accuracy and Comparison of Output Evaluation.

UIM 5 Redo - 16 Minutes of SA 50# Thrusters and Burpees EMOM

This was a difficult workout that although brief was exhausting.  The two primary watches evaluated it differently, albeit with the same number system.  The Recovery time was inclusive of this work, a morning run, and a brief morning swim not shown.  After the three activities of the morning I feel the Garmin was a little more accurate, but I really felt like it should have been in the middle, and may lean towards Coros as the more appropriate because nothing was deeply and extensively exhausting.
Coros - 2.4 Aerobic Effect - 0.9 Anaerobic Effect - 16.6 Hours of Recovery needed
Garmin - 3.1 Aerobic Effect - 1.9 Anaerobic Effect - 34 Hours of Recovery needed

Monostructural - 3.5 Mile Run

The two differed more significantly - this is with both paired to the same chest strap for accuracy.  I feel like the Coros was correct on the anaerobic side (it was a steady-state run), and the Garmin far more accurate not the Aerobic side.  The Garmin gave ~20 hours of Recovery and the Coros ~11 hours.  Not being much of a runner the 20 felt more accurate, but based on HR strength/capability I think the Coros was more spot on.
Coros - 1.6 Aerobic Effect - 0.0 Anaerobic Effect
Garmin - 3.1 Aerobic Effect - 1.0 Anaerobic Effect.

Hill Sprints & Goblet Squats

The watches are starting to align more and more - this was a run followed by 10 rounds of 10 goblet squats and a hill sprint.  
The Recovery times were close - Garmin had a 6-7 hour residual build up from the day before.
Coros - 3.0 Aerobic/2.0 Anaerobic - 21.5 Hours Recovery
Garmin - 3.0 Aerobic/1.2 Anaerobic - ~+34 Hours Recovery

Support Your Box 3 and 15 min of Assault Intervals

The two lined up really well, with similar outputs and Recovery. This was from 0 Recovery time built up
Coros - 1.2 Days
Garmin - 1.5 Days

C&J EMOM, Back Squats, and UIM “Move” 6 (Jumping Squats & Burpees)

The Coros is lining up really well with the Garmin. They both had similar outputs and Recovery Time - the Recovery below is added to accumulation from the previous workout, and they somewhat matched in total time added.
Coros - 3.4/2.3 - Recovery 1.2 Days - 573 Calories
Garmin - 3.6/2.2 - Recovery 1.5 Days - 599 Calories

Filthy Fifty

Coros - 3.6/2.8 - Recovery 28.4 hours - 656 Calories
Garmin - 4.3/2.1 - Recovery 42 hours - 683 Calories