Lower Limb Strength and Power as Predictors of Brain Blood Flow During Exercise (LLSPP)
Lower Limb Muscle Strength and Power Predict Exercise-Induced Prefrontal Hemodynamic Response: An Interpretable Machine Learning Study Using fNIRS Data
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Moscow, Rusland, 117519
- Moscow State University of Sport and Tourism
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- Healthy adults aged between 18.00 and 60.00 years.
- Must be able to perform standardized lower-limb physical assessments, including isokinetic strength testing and explosive power tests (e.g., CMJ, SJ, and 30m sprints).
- Capability to complete a 6-minute aerobic cycling task at a moderate intensity (60% VO_2max).
- Physically cleared for exercise as determined by a Physical Activity Readiness Questionnaire (PAR-Q).
- Willingness to undergo functional near-infrared spectroscopy (fNIRS) monitoring with a Scalp Coupling Index (SCI) ≥ 0.7.
Exclusion Criteria:
- History of musculoskeletal injuries to the lower limbs within the past 6 months that would impede maximum voluntary contraction (MVC) or high-intensity efforts.
- Known cardiovascular, respiratory, or neurological conditions that contraindicate maximal exercise testing (VO_2max ramp protocol).
- Body Mass Index (BMI) or health status that prevents the safe completion of high-impact explosive power tests like the 30cm drop jump (RSI assessment).
- Presence of excessive motion artifacts or poor fNIRS signal quality, specifically a Signal-to-Noise Ratio (SNR) < 5 dB or motion artifact frame ratio ≥$ 10%.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
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Andet: Standardized Physical Performance and Hemodynamic Observation Group
Observational Study Arm
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Participants undergo a comprehensive physiological and biomechanical assessment protocol divided into three phases.
First, demographic and morphological data (Age, Sex, BMI, and Body Fat %) are collected, followed by a maximal oxygen consumption (VO_2max) test using a Bruce-modified ramp protocol on a cycle ergometer.
Second, participants complete a standardized lower-limb neuromuscular battery, including isokinetic strength testing at 60°/s (peak torque for knee, hip, and ankle) via a Biodex System 4 Pro, a 1RM leg press, and explosive power assessments comprising Countermovement Jumps (CMJ), Squat Jumps (SJ), and 30m sprints.
Finally, cortical hemodynamic activity is monitored using a 16-channel fNIRS system (NIRSport2) over the bilateral dorsolateral prefrontal cortex (DLPFC) during a 6-minute constant-load cycling task at 60% VO_2max.
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Area Under the Curve of Oxygenated Hemoglobin (Δ HbO AUC) during Aerobic Exercise
Tidsramme: Measured during the 6-minute constant-load cycling task (60%VO_2max), which occurs approximately 120 minutes after the start of the experimental session.
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Cortical hemodynamics are measured using the NIRSport2 fNIRS system over the bilateral dorsolateral prefrontal cortex (DLPFC).
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Measured during the 6-minute constant-load cycling task (60%VO_2max), which occurs approximately 120 minutes after the start of the experimental session.
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Demographic and Morphological Baseline Profile
Tidsramme: Baseline (Minutes 0-20 of the session).
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Collection of foundational participant data including Age, Height (InBody H20N), Weight, BMI, and Body Fat % (InBody 770 via multi-frequency bioelectrical impedance).
Resting Heart Rate (RHR) is recorded after 5 minutes of quiet rest.
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Baseline (Minutes 0-20 of the session).
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Isokinetic Neuromuscular Strength Battery
Tidsramme: Post-baseline assessment (Minutes 30-60 of the session).
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Evaluation of lower-limb strength using a Biodex System 4 Pro at an angular velocity of 60°/s.
Metrics include peak torque for knee extension/flexion, hip extension, and ankle plantarflexion, as well as the 1RM leg press and Hamstring/Quadriceps (H:Q) ratio.
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Post-baseline assessment (Minutes 30-60 of the session).
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Explosive Power and Functional Performance Metric
Tidsramme: Following isokinetic testing (Minutes 70-90 of the session).
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Assessment of neuromuscular power through Countermovement Jump (CMJ), Squat Jump (SJ), Reactive Strength Index (RSI via 30cm drop jump), 30m sprint time, and standing long jump.
Functional strength is measured using the Five Times Sit-to-Stand (FiveTSTS) test.
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Following isokinetic testing (Minutes 70-90 of the session).
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Peak Cardiorespiratory Capacity (VO_2max)
Tidsramme: Final physical assessment before the hemodynamic task (Minutes 100-120 of the session).
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Maximal oxygen consumption determined through a Bruce-modified ramp protocol (25 W starting load, increasing 25 W/min) on a cycle ergometer until volitional exhaustion.
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Final physical assessment before the hemodynamic task (Minutes 100-120 of the session).
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Samarbejdspartnere
Samarbejdspartnere
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- WSUST-IRB-070225
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
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