
Sarah Mitchell
Women's 35-44
Kent, UK
Goal
Improve endurance & heart health
Approach
We used testing to set accurate zones then built a progressive block with weekly check ins.
Outcome
Better pacing clarity higher repeatability and improved confidence on hard sessions.
Strongest Pillar
Heart
(88/100)
Key area to improve
Control
(62/100)
Result Summary
+17 points overall. VO₂ max up 14%.
Vitality Score
85
100
Vitality Age
32

Josh Axel
Men’s 25–34
Kent, UK
Goal
Improve endurance & heart health
Approach
We used testing to set accurate zones then built a progressive block with weekly check ins.
Outcome
Better pacing clarity higher repeatability and improved confidence on hard sessions.
Strongest Pillar
Heart
(88/100)
Key area to improve
Control
(62/100)
Result Summary
+17 points overall. VO₂ max up 14%.
Vitality Score
98
100
Vitality Age
18
Individual results vary. VITRO scores are fitness benchmarking information, not medical diagnoses or guarantees of future outcomes.

Sarah Mitchell
Women's 35-44
Kent, UK
Goal
Improve endurance & heart health
Approach
We used testing to set accurate zones then built a progressive block with weekly check ins.
Outcome
Better pacing clarity higher repeatability and improved confidence on hard sessions.
Strongest Pillar
Heart
(88/100)
Key area to improve
Control
(62/100)
Result Summary
+17 points overall. VO₂ max up 14%.
Vitality Score
85
100
Vitality Age
32

Josh Axel
Men’s 25–34
Kent, UK
Goal
Improve endurance & heart health
Approach
We used testing to set accurate zones then built a progressive block with weekly check ins.
Outcome
Better pacing clarity higher repeatability and improved confidence on hard sessions.
Strongest Pillar
Heart
(88/100)
Key area to improve
Control
(62/100)
Result Summary
+17 points overall. VO₂ max up 14%.
Vitality Score
98
100
Vitality Age
18
Individual results vary. VITRO scores are fitness benchmarking information, not medical diagnoses or guarantees of future outcomes.

Sarah Mitchell
Women's 35-44
Kent, UK
Goal
Improve endurance & heart health
Approach
We used testing to set accurate zones then built a progressive block with weekly check ins.
Outcome
Better pacing clarity higher repeatability and improved confidence on hard sessions.
Strongest Pillar
Heart
(88/100)
Key area to improve
Control
(62/100)
Result Summary
+17 points overall. VO₂ max up 14%.
Vitality Score
85
100
Vitality Age
32

Josh Axel
Men’s 25–34
Kent, UK
Goal
Improve endurance & heart health
Approach
We used testing to set accurate zones then built a progressive block with weekly check ins.
Outcome
Better pacing clarity higher repeatability and improved confidence on hard sessions.
Strongest Pillar
Heart
(88/100)
Key area to improve
Control
(62/100)
Result Summary
+17 points overall. VO₂ max up 14%.
Vitality Score
98
100
Vitality Age
18
Individual results vary. VITRO scores are fitness benchmarking information, not medical diagnoses or guarantees of future outcomes.