ISSA Senior Fitness key terms

Age-related loss of skeletal muscle mass, strength, and function that begins around the fourth decade and accelerates after age 60, raising fall risk and reducing independence in daily tasks.

Loss of muscle strength not fully explained by loss of muscle size, reflecting neural and contractile changes; strength often declines faster than mass, so function must be tested directly.

Blunted muscle protein synthesis response to protein intake and resistance exercise in older adults, requiring higher per-meal protein doses and adequate training stimulus to preserve muscle.

A syndrome of reduced physiological reserve and heightened vulnerability to stressors, marked by unintentional weight loss, exhaustion, weakness, slow walking, and low activity.

Loss of elastic recoil in large arteries with age, raising systolic blood pressure and cardiac workload; steady aerobic work and blood pressure monitoring guide safe exercise prescription.

A drop in blood pressure on standing, common with age-related baroreflex changes and medications, causing dizziness; clients should rise slowly and use support after floor work.

Declining inner-ear balance function with age that impairs gaze stabilization and postural control; training includes head turns while walking and progressive balance challenges.

The nervous system's shifting reliance among vision, somatosensation, and vestibular input to stay upright; older adults over-rely on vision, so practice with altered sensory conditions builds adaptability.

Maintaining a stable posture with minimal movement, such as standing on one leg or in tandem stance; progress by narrowing the base, closing eyes, or adding unstable surfaces.

Controlling the center of mass while moving, as in walking, stepping, or reaching; train with gait variations, stepping patterns, and directional weight shifts.

Recovering stability after an unexpected perturbation, such as a slip or bump; drills include rapid stepping responses and controlled loss-of-balance practice with close supervision.

How quickly force rises after contraction begins; it underlies fast corrective steps and is trained with explosive, low-load movements performed only when technique and joints allow.

Training to move a moderate load quickly, emphasizing velocity over maximal load; preserves fast-twitch function and everyday tasks like stair climbing better than slow heavy lifting alone.

Systematically increasing training demand over time through load, repetitions, sets, range, or complexity so adaptation continues without exceeding tissue tolerance.

A planned lighter training period, often reduced volume or load, that lets older clients recover from accumulated fatigue and joint stress while maintaining routine and adherence.

The ability to restore function after training stress, which declines with age and chronic disease; spacing hard sessions and prioritizing sleep and nutrition support progress.

The arc through which a joint moves, limited by capsule, muscle, and connective tissue; training through full tolerable range maintains function and supports joint health.

Increased resistance to passive movement from age-related connective tissue changes and inactivity; regular mobility work and warm-ups reduce it and improve movement quality.

Degenerative joint disease with cartilage loss, pain, and stiffness; supervised strengthening and low-impact aerobic exercise reduce pain and improve function, avoiding high-impact loads during flares.

Low bone mineral density that raises fracture risk; weight-bearing and resistance training support bone, while flexion-heavy spine loading and high fall risk require caution.

Adapting exercise to persistent diseases such as diabetes, hypertension, or arthritis by adjusting intensity, monitoring symptoms, and coordinating with the client's medical team.

Structured review of falls history, medications, vision, footwear, and balance tests to identify clients needing medical referral or closer supervision before challenging balance work.

A client-reported effort scale, such as 0 to 10, used to set and adjust intensity when heart-rate formulas are unreliable because of age, medications, or arrhythmia.

The physical ability to perform everyday tasks such as carrying groceries, rising from a chair, and climbing stairs; programs are built around these real-world movements.

Routine self-care tasks including bathing, dressing, transferring, and eating; training that mimics these movements preserves independence and guides exercise prioritization.

Walking velocity, often measured over a short fixed distance; a practical marker of vitality and fall risk, with slower speeds prompting closer assessment and targeted training.

Timed or counted repetitions of standing from a chair, assessing lower-body strength, power, and balance relevant to daily life; results inform progression and exercise selection.

Spreading protein intake across meals in adequate per-meal doses to better stimulate muscle protein synthesis in older adults, complementing resistance training.

A client's belief in their ability to perform a task or sustain a behavior; mastery experiences and realistic early successes build it and predict exercise adherence.

Coaching that offers meaningful choices and rationale, supporting the client's sense of volition; it improves motivation quality and long-term participation in older adults.

Collaboratively defining specific, measurable, time-bound outcomes that matter to the client, such as gardening without rest; reviewed regularly to sustain direction and motivation.

Building exercise into stable cues and routines so participation requires less deliberate effort; consistent times, locations, and small initial commitments support it.

Encouragement and accountability from family, peers, or group classes that improves adherence and enjoyment; group-based programs suit many older clients well.

A client's ability to obtain and understand health information to make decisions; plain language, demonstration, and written summaries improve comprehension and safe participation.

Sustained programming across the lifespan that combines aerobic, strength, balance, and flexibility work to preserve function, independence, and quality of life.

Combining strength, balance, aerobic, and flexibility work in one program; this blend reduces falls and improves function more than any single modality alone.