Results · Grossen Performance

Real clients.
Real outcomes.

Pain resolved. Strength rebuilt. Bodies that last. Six clients over the last few years. Filter by coach, or read them all.

1.5 months in
7 months

Real Result · Online · Coach Dries

Katja picked up lifting at 47 and made it part of who she is.

Never trained before. Seven months later: 12 kg down, body fat cut by a third, and a body she enjoys seeing in the mirror. Started in-person, now training online.

"I have been working with Dries for the last 7 months and cannot be happier. A knowledgeable coach with a holistic approach: training and nutrition working together. His programs follow the perfect logic, aimed at the client's goals in the best and most reasonable way. Worth mentioning his calm and friendly personality. You always feel like he has your back.

I had never trained until my 47th year, and never thought it would be possible to achieve what I have: 67 kg down to 55, 32% body fat down to 21%, seeing my body look different in the mirror and really enjoying training. Lifting is now part of my personality, and a big thank you to Dries for this."

Katja

−12 kg
Body weight lost
67 kg to 55 kg
−11%
Body fat lost
32% to 21%
First time
Training at 47
now part of her life
Trap bar deadlift
Chin-up

Real Result · Online · Coach Agathe

An executive with two hip replacements who couldn't move without pain.

After three decades of intense exercise and two as an elite athlete, he carried hip replacements, a damaged shoulder, and a calf tear. He was in pain, losing mobility, and getting weaker.

2.5 years later: posture so improved people ask if he's gotten taller. Walks without pain. Strength back to where it was a decade ago. Wakes up looking forward to the day.

"Her precision in ensuring my movements were correct and knowing when to push me beyond what I thought were my limits drove results without injuries. There has without a doubt been a measurable and marked change in my form, nature, and appearance."

Pain-free
Movement restored
after 2 hip replacements
2.5+ yrs
Coaching relationship
started in-person, now online
Strength
Back to 10-year-ago levels
at age 57
Client before coaching Before
Client after 6 months of coaching 6 months
Client after continued coaching After

Real Result · In-Person · Coach Dries

A law firm partner who wanted to lose weight without giving up his schedule.

Came in to lose weight. Stayed because the plan bent around court schedules and client dinners, not the other way around. The fat came off. The muscle came on. The strength followed.

−15 kg
Fat lost
calories went up, not down
+5 kg
Lean muscle gained
after the first 6 months
100 kg
Back squat
new personal record
Client before ACL rehab Before
Client after ACL rehab After

Real Result · Online · Coach Agathe

A 28-year-old who tore his ACL and needed a complete rebuild.

Post-ACL surgery, a full rebuild. We also worked on his nutrition to fuel his performance, lift his energy levels, and resolve food sensitivities driving gut issues. He's now competing in Hyrox races.

Full rehab
ACL reconstruction
complete return to training
Hyrox
Competing now
from ACL tear to race day
Fixed
Gut issues
food sensitivities resolved
Front squat: 85 kg x2

Real Result · Online · Coach Dries

A 16-year-old semi-pro soccer player with knee pain.

Fast on the pitch, weak in the gym. Knee pain traced to poor movement patterns. Six months of structured strength work resolved the pain and closed the gap.

85 kg x2
Front squat
from knee pain to heavy squats
+20 kg x3
Weighted chin-ups
bodyweight to loaded
Pain-free
Knee issues resolved
Client before training Before
Client after 2 years of training After

Real Result · In-Person · Coach Agathe

A teenager written off as fragile. Now strong enough to prove them wrong.

Everyone else told him to be careful. Two years later: 8 kg of muscle, muscle-ups, and a body he trusts instead of protects.

+8 kg
Lean muscle gained
over 2 years
Muscle-ups
Strength milestone
from corrective work to performance
Body he trusts
Instead of protects
2 years of rebuild

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