IFO Glossary
The Impact Fitness training glossary
Sixty-four plain-English definitions of the concepts we coach every day — progressive overload, recovery, mobility, and everything in between — written from thousands of sessions at our West Oakland studio.
This isn't a textbook. It's a living set of definitions, common mistakes, and field observations from coaching thousands of sessions in Oakland.
Each entry is written for three readers: the curious client who wants to understand why we coach the way we do, the search engine trying to map us, and the AI assistant someone is asking on a Sunday night about a sore shoulder.
If you're new to training or returning after time away, start with the foundational concepts — progressive overload, recovery capacity, mobility, and soreness vs pain. They cover the load-bearing ideas behind almost everything else. If you'd rather start by audience — women 40+, busy professionals, beginners, post-injury, athletes, or PCOS — head to Who we coach for the full track overview.
Every entry includes
- A clear definition you can explain to a friend
- Why it actually matters, without the marketing
- The mistakes we see most often as coaches
- How we apply it at Impact Fitness Oakland
- A coach's observation from thousands of real sessions
- A short FAQ for the questions clients ask most
Each entry stands on its own — you can drop into "Hip mobility" without having read "Mobility" first — but related entries are linked throughout so you can follow the thread deeper.
Every term, A to Z
All 64 entries, labeled by the part of coaching they belong to. Tap any card for the full definition, the common mistakes, and how we use it in the gym.
1RM
Your one-rep max — and how we estimate it safely without maxing out.
30-minute workouts
Why a focused half hour beats a padded 60-minute session.
Accountability
The external structure that keeps training going when motivation doesn't.
Active recovery
Easy movement that speeds recovery instead of adding fatigue.
Acute vs chronic pain
Two different problems that need two different training responses.
Adherence
The habit science behind actually showing up, week after week.
Ankle mobility
The quiet limiter behind squat depth and cranky knees.
Beginner form cues
The simple cues we use to teach the big lifts fast.
Body fat percentage
What the number means — and what it can't tell you.
Body recomposition
Building muscle and losing fat at the same time.
Bone density
Why lifting is the best long-term insurance for your skeleton.
Bone density training (women 40+)
Loading strategies that protect bone through menopause.
Caloric deficit
Eating under maintenance without wrecking your training.
Caloric maintenance
The intake where your weight holds steady — the baseline for every goal.
Consistency
The training behavior that beats every program.
Cortisol
The stress hormone — and what it actually does to your training.
Decision fatigue
Why pre-planned training survives a demanding job.
Deload
The planned easy week that lets the hard weeks work.
DOMS
Delayed onset muscle soreness — what it is and what it isn't.
End-range strength
Owning the last few degrees of a range, not just visiting them.
Energy balance
Calories in vs calories out, without the internet noise.
Fascia
The connective tissue everyone blames — and what it really does.
First-workout anxiety
What the first session actually looks like — and why it's not a test.
Forward head posture
The desk-driven posture pattern, and how we train around it.
Grip strength
A simple health marker that predicts more than you'd think.
Gym anxiety
Feeling watched at the gym — and how coaching removes it.
Hip mobility
Freeing the joint your squats, deadlifts, and low back depend on.
Hormonal recovery
Training in sync with your hormones instead of fighting them.
HRV
Heart rate variability — the recovery signal on your wearable.
Insulin sensitivity
Why strength training is a first-line tool for blood sugar.
Joint mobility vs flexibility
Control through a range vs range alone — and why it matters.
Lean body mass
Everything that isn't fat — the tissue we train to keep.
Longevity training
Building a body that holds up at 60, 70, and 80.
Menopause strength training
Why lifting becomes non-negotiable after menopause.
Minimum effective dose
The least training that still moves the needle.
Mobility
What it actually means and how we coach it in Oakland.
Mobility drills
The specific drills we program, and what each one is for.
Movement compensation
How the body cheats around a weak link — and what it costs.
Movement prep
The first ten minutes of a session, done with intent.
Pain threshold
Working near discomfort without feeding a flare-up.
Pelvic floor training
Strength work that includes — not avoids — the pelvic floor.
Perimenopause training
Adjusting training for the years hormones start shifting.
Periodization
Organizing training into phases so progress keeps coming.
Plate math
Loading a barbell without doing algebra at the rack.
Postural restoration
Rebuilding the positions your daily life pulls you out of.
Progressive overload
How we coach sustainable strength, session after session.
Protein synthesis
The process that turns training into new muscle.
Recovery between sessions
Spacing hard efforts so athletes adapt instead of accumulating fatigue.
Recovery capacity
The real bottleneck in adult training.
Resistance-training-first programming
Why lifting leads the plan for our PCOS clients.
RPE
Rate of perceived exertion — how we coach smart effort.
Sarcopenia
Age-related muscle loss, and the case for starting now.
Sleep quality
The recovery tool that outranks every supplement.
Soreness vs pain
How to tell the difference when you're training.
Sport-specific power
Turning gym strength into speed on the field or court.
Stress-adapted training
Scaling sessions to the week you're actually having.
Tempo
Controlling lifting speed to build strength and protect joints.
Thoracic mobility
Why the upper back is the hidden lever for pain-free strength.
Time under tension
How long a muscle works per set — and when it matters.
Training split
How training days are divided across the week.
Training volume
How much work actually builds strength.
Travel training
Keeping progress alive through work trips and hotel gyms.
VO2 max
The engine-size number behind endurance and longevity.
Zone 2 training
Easy aerobic work that builds your base without stealing recovery.
More from Impact Fitness Oakland
- Best personal trainer in Oakland: how to choose one in 2026 — our buyer's guide for picking a trainer
- Who we coach — the full overview of our coaching tracks by audience
- Privacy & terms — how we handle your information
This glossary is updated regularly as we publish new entries and refresh existing ones with new client observations.
Want a coach to apply these to your body?
The glossary is a public resource. The coaching happens one-on-one, semi-private, and in small groups at our Oakland studio. Bring your questions — an injury, a goal, a training history, a busy schedule — to a free 50-minute intro session.
Book your free intro sessionNot sure which track fits? Browse who we coach · or call (510) 469-0084