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Individualized Versus Non-Individualized Resistance Training

5. listopadu 2026 aktualizováno: Christophe Delecluse, Universitaire Ziekenhuizen KU Leuven

Intervence šitá na míru k prevenci poklesu svalové síly a funkčních schopností souvisejícím s věkem

Preserving functional ability is crucial for healthy aging. Unfortunately, age-related decreases in muscle power often lead to declines in functional ability. As power is the product of force and velocity, decreases in power can originate from changes in muscle force, contraction velocity, or both, varying between individuals. The primary method to prevent functional disability is power-based resistance training. Although training interventions are effective for most older adults, they do not induce substantial improvements in a subset of the population. These inconsistent outcomes may arise from neglecting the observed differences in the force-velocity (F-V) profiles between individuals. Therefore, this study provides a novel approach to resistance exercise, in which exercise dose is tailored according to the individual's F-V profile. The effectiveness of the tailored method will be assessed in a randomized control trial, comparing the effects of an individualized and a non-individualized 12-week training intervention on muscle power parameters and functional ability.

Přehled studie

Postavení

Dokončeno

Podmínky

Intervence / Léčba

Typ studie

Intervenční

Zápis (Aktuální)

80

Fáze

  • Nelze použít

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní místa

    • Vlaams-Brabant
      • Leuven, Vlaams-Brabant, Belgie, 3000
        • KU Leuven - Department of Movement Sciences

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

65 let a starší (Starší dospělý)

Přijímá zdravé dobrovolníky

Ano

Pohlaví způsobilá ke studiu

Všechno

Popis

Inclusion Criteria:

  • Community-dwelling adults
  • At least 65 years old

Exclusion Criteria:

  • Systematic engagement in resistance exercise during the past year
  • Unstable cardiovascular disease, neuromuscular disease, acute infection or fever
  • Recent surgery
  • Lower-extremity injuries
  • Low levels of functional ability (i.e., SPPB score ≤ 9)
  • Cognitive malfunctioning (i.e., Mini-Mental State Examination < 24)

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Prevence
  • Přidělení: Randomizované
  • Intervenční model: Paralelní přiřazení
  • Maskování: Žádné (otevřený štítek)

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: Individualized resistance exercise program

Individualized exercise dose. All individuals perform resistance exercises at a load that targets their deficit. Individuals with a velocity deficit train at low loads while individuals with a force deficit train at high loads.

2x/week, 35-45 min sessions, on leg press machine

Aktivní komparátor: Non-individualized resistance exercise program

Non-individualized exercise dose. All individuals perform resistance exercises at a load that does not target their deficit. Individuals with a velocity deficit train at high loads while individuals with a force deficit train at low loads.

2x/week, 35-45 min sessions, on leg press machine

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Maximal power (Pmax)
Časové okno: Change from baseline at 6 and 12 weeks

Participants performed explosive unilateral leg extensions with the dominant leg at five submaximal loads on a pneumatic leg press (Leg Press Air 400, Keiser, USA). Submaximal loads were scaled to the estimated maximal isometric force derived from the familiarization session. The three lighter loads were performed three times each and the two heavier loads twice, with the repetition yielding the highest mean concentric velocity retained for analysis. Participants subsequently performed single repetitions at incrementally increasing loads until 1-RM was reached. Rest intervals were adjusted according to the load of the preceding trial: 60 s after the three lightest loads, 90 s after the two heavier loads, and 120 s during the incremental trials leading to 1-RM. For each load, the mean concentric velocity of the best trial was used to establish the individual force-velocity (F-V) relationship using linear regression, from which the maximal power (Pmax; W) was estimated.

Change from baseline at 6 and 12 weeks
Maximal isometric force (F0)
Časové okno: Change from baseline at 6 and 12 weeks

Participants performed explosive unilateral leg extensions with the dominant leg at five submaximal loads on a pneumatic leg press (Leg Press Air 400, Keiser, USA). Submaximal loads were scaled to the estimated maximal isometric force derived from the familiarization session. The three lighter loads were performed three times each and the two heavier loads twice, with the repetition yielding the highest mean concentric velocity retained for analysis. Participants subsequently performed single repetitions at incrementally increasing loads until 1-RM was reached. Rest intervals were adjusted according to the load of the preceding trial: 60 s after the three lightest loads, 90 s after the two heavier loads, and 120 s during the incremental trials leading to 1-RM. For each load, the mean concentric velocity of the best trial was used to establish the individual force-velocity (F-V) relationship using linear regression, from which maximal isometric force (F0; N) was estimated.

Change from baseline at 6 and 12 weeks
Maximal unloaded velocity (V0)
Časové okno: Change from baseline at 6 and 12 weeks

Participants performed explosive unilateral leg extensions with the dominant leg at five submaximal loads on a pneumatic leg press (Leg Press Air 400, Keiser, USA). Submaximal loads were scaled to the estimated maximal isometric force derived from the familiarization session. The three lighter loads were performed three times each and the two heavier loads twice, with the repetition yielding the highest mean concentric velocity retained for analysis. Participants subsequently performed single repetitions at incrementally increasing loads until 1-RM was reached. Rest intervals were adjusted according to the load of the preceding trial: 60 s after the three lightest loads, 90 s after the two heavier loads, and 120 s during the incremental trials leading to 1-RM. For each load, the mean concentric velocity of the best trial was used to establish the individual force-velocity (F-V) relationship using linear regression, from which maximal unloaded velocity (V0; m/s) was estimated.

Change from baseline at 6 and 12 weeks
Force-velocity slope
Časové okno: Change from baseline at 6 and 12 weeks

Participants performed explosive unilateral leg extensions with the dominant leg at five submaximal loads on a pneumatic leg press (Leg Press Air 400, Keiser, USA). Submaximal loads were scaled to the estimated maximal isometric force derived from the familiarization session. The three lighter loads were performed three times each and the two heavier loads twice, with the repetition yielding the highest mean concentric velocity retained for analysis. Participants subsequently performed single repetitions at incrementally increasing loads until 1-RM was reached. Rest intervals were adjusted according to the load of the preceding trial: 60 s after the three lightest loads, 90 s after the two heavier loads, and 120 s during the incremental trials leading to 1-RM. For each load, the mean concentric velocity of the best trial was used to establish the individual force-velocity (F-V) relationship using linear regression, from which the F-V slope (Ns/m) was derived.

Change from baseline at 6 and 12 weeks

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Short Physical Performance Battery (SPPB)
Časové okno: Score at baseline

Total score on the SPPB (min 0, max 12, higher scores indicate better performance)

Score at baseline
Hand grip strength
Časové okno: Change from baseline at 6 and 12 weeks

Maximal grip strength (kg) of the dominant hand using an isometric dynamometer adjusted for hand size

Change from baseline at 6 and 12 weeks
Maximal gait speed
Časové okno: Change from baseline at 6 and 12 weeks

The average time (s) to walk 10m as fast as possible

Change from baseline at 6 and 12 weeks
Countermovement jump
Časové okno: Change from baseline at 6 and 12 weeks

The jump height (mm) in a countermovement jump

Change from baseline at 6 and 12 weeks
Timed up-and-go
Časové okno: Change from baseline at 6 and 12 weeks

The time (s) needed to stand up from a chair, walk 3 m, turn, walk back and sit down again as fast as possible

Change from baseline at 6 and 12 weeks
5-repetition sit-to-stand time
Časové okno: Change from baseline at 6 and 12 weeks

The time (s) needed to complete the 5-repetition sit-to-stand test

Change from baseline at 6 and 12 weeks
5-repetition sit-to-stand power
Časové okno: Change from baseline at 6 and 12 weeks

The average power (watt) produced during the 5-repetition sit-to-stand test

Change from baseline at 6 and 12 weeks
30-second sit-to-stand repetitions
Časové okno: Change from baseline at 6 and 12 weeks

The number of repetitions completed during the 30-second sit-to-stand test

Change from baseline at 6 and 12 weeks
30-second sit-to-stand power
Časové okno: Change from baseline at 6 and 12 weeks

The average power (watt) produced during the 30-second sit-to-stand test

Change from baseline at 6 and 12 weeks
Stair ascent time
Časové okno: Change from baseline at 6 and 12 weeks

The time (s) needed to ascend a flight of stairs

Change from baseline at 6 and 12 weeks
Stair ascent power
Časové okno: Change from baseline at 6 and 12 weeks

The average power (Watt) produced during the stair ascent test

Change from baseline at 6 and 12 weeks
Exercise adherence
Časové okno: Total adherence over 12-week period

Number of sessions attended as a percentage of total sessions planned

Total adherence over 12-week period
Absolute training load
Časové okno: Consistently recorded throughout the 12-week intervention

The absolute load (kg) used during training sessions

Consistently recorded throughout the 12-week intervention
Relative training load
Časové okno: Consistently recorded throughout the 12-week intervention

The relative load (%1RM) used during training sessions

Consistently recorded throughout the 12-week intervention
Number of repetitions
Časové okno: Consistently recorded throughout the 12-week intervention

The number of repetitions (n) completed per set

Consistently recorded throughout the 12-week intervention
Highest movement velocity within a set
Časové okno: Consistently recorded throughout the 12-week intervention

The velocity (m/s) of the fastest repetition in a set (Vmax)

Consistently recorded throughout the 12-week intervention
Lowest movement velocity within a set
Časové okno: Consistently recorded throughout the 12-week intervention

The velocity (m/s) of the slowest repetition in a set (Vmin)

Consistently recorded throughout the 12-week intervention
Velocity loss
Časové okno: Consistently recorded throughout the 12-week intervention

The percentage difference between the highest and lowest movement velocity in a set = ([Vmax - Vmin] / Vmax) × 100

Consistently recorded throughout the 12-week intervention
Set-volume index
Časové okno: Consistently recorded throughout the 12-week intervention

The number of repetitions × relative load (%1-RM) per set

Consistently recorded throughout the 12-week intervention
Session-volume index
Časové okno: Consistently recorded throughout the 12-week intervention

The sum of set volumes per session

Consistently recorded throughout the 12-week intervention

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Publikace a užitečné odkazy

Osoba odpovědná za zadávání informací o studiu tyto publikace poskytuje dobrovolně. Mohou se týkat čehokoli, co souvisí se studiem.

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Aktuální)

20. května 2024

Primární dokončení (Aktuální)

4. prosince 2025

Dokončení studie (Aktuální)

4. prosince 2025

Termíny zápisu do studia

První předloženo

5. března 2024

První předloženo, které splnilo kritéria kontroly kvality

5. června 2024

První zveřejněno (Aktuální)

10. června 2024

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

6. listopadu 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

5. listopadu 2026

Naposledy ověřeno

1. listopadu 2026

Více informací

Termíny související s touto studií

Další identifikační čísla studie

  • S68434

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NE

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Tyto informace byly beze změn načteny přímo z webu clinicaltrials.gov. Máte-li jakékoli požadavky na změnu, odstranění nebo aktualizaci podrobností studie, kontaktujte prosím register@clinicaltrials.gov. Jakmile bude změna implementována na clinicaltrials.gov, bude automaticky aktualizována i na našem webu .