Kettlebell Swings and Paraspinal Muscle Function

University of Central Florida

Status: Completed

Conditions: Exercise Training

Treatments: Other: Kettlebell swing

Study type: Interventional

Funder types: Other

Identifiers

NCT06069271

00001277

Details and patient eligibility

About

The purpose of this randomized control trial is to determine the extent of muscle fatigue in the lumbar erector spinae musculature secondary to a high-intensity interval kettlebell swing protocol utilizing TMG previously published by Jay et. al in 2011.

Full description

Background: Kettlebell swings are commonly utilized to target the lumbar erector spinae and lower body musculature. This exercise exhibits distinct loading properties that requires cyclical contraction of the trunk extensors and posterior chain, potentially explaining its novel influence on muscle contractility. Tensiomyography (TMG) is a reliable, noninvasive, passive technique that may be used to examine muscular fatigue produced by kettlebell swings. Purpose: The purpose of this randomized control trial is to determine the extent of muscle fatigue in the lumbar erector spinae musculature secondary to a high-intensity interval kettlebell swing protocol utilizing TMG previously published by Jay et. al in 2011. Subjects: Forty-one adults between the ages of 18 and 45 were recruited. Inclusion criteria included subjects with no recent history of low back pain and clearance by the physical activity readiness questionnaire. Methods: Participants were randomly allocated to either a kettlebell swing group (KBS; n=21) or a control group (CON; n=20) who only performed the unloaded warm up. Participants were assessed at baseline, post-intervention, and 24-hours post-intervention for bilateral erector spinae fatigue, measured by five TMG parameters (Dm, Tc, Tr, Td, Ts).

Enrollment: 41 patients

Sex: All

Ages: 18 to 45 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Ages of 18 and 45 years of age.
• Clear PAR-Q

Exclusion criteria

• history of low back pain
• pre-existing injuries
• If "YES" was the response to any of the seven questions in the PAR-Q, the participant was deemed to be unable to exercise safely.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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41 participants in 2 patient groups

Rest

No Intervention group

Description:

Subjects in the control group were instructed to complete the general warm up followed by a 10-minute rest period.

Exercise

Experimental group

Description:

The intervention group completed two-handed Russian KBSs using an interval training protocol outlined by Jay et al.10 involving 30 seconds of work followed by 30 seconds of rest for 10 total intervals. Prior to completing the intervention, participants completed a general warmup consisting of 10 non-weighted squats, 10 non-weighted dead-lifts, and 10 dowel rod shoulder flexion repetitions. Participants were instructed to perform all warm-up activities at an intensity of 70% of maximal effort using a Rate of Perceived Exertion scale(RPE).

Treatment:

Other: Kettlebell swing