None listed
Conditions
Brief summary
This study will examine the neuromuscular, physiological and perceptual responses to two types of modified high intensity running sessions typically used in rugby training environments, i.e. linear (L) vs. shuttle run with multiple changes of direction (COD). Measures of muscle function (i.e. knee flexion, extension, shallow range eccentric hamstrings and adductor squeeze) will be recorded before and immediately after both protocol A (linear) and B (multidirectional). Blood lactate concentration ([La]), rating of perceived effort (RPE), heart rate (HR) and a perceptual measure of fatigue questionnaire will also be measured at each trial. Movement characteristics during running will also be recorded using a 10Hz GPS system. Subjects will run at maximal speed during 30 m shuttles set up in accordance to either protocol A or B. Each 30m of running will be followed by 30 m walking at <1 m/s. Subjects will run a total distance of 1500 m in both protocols. Neuromuscular markers will be reassessed at 48 hours post running.
Interventions
Subjects will run at maximal speed during 30 m shuttles set up in accordance to either protocol A or B. Each 30m of running will be followed by 30 m walking at <1 m/s.
Subjects will run a total distance of 1500 m in both protocols.
Prog A will involve participants running at maximal speeds for 30m in a straight line, followed by a 30m walk and repeated until 1500m of running has been complete. This will likely take 30-45 minutes to complete. This will only be ran once, with Prog B being test
Subjects will run at maximal speed during 30 m shuttles set up in accordance to either protocol A or B. Each 30m of running will be followed by 30 m walking at <1 m/s. Subjects will run a total distance of 1500 m in both protocols. Prog A will involve participants running at maximal speeds for 30m in a straight line, followed by a 30m walk and repeated until 1500m of running has been complete. This will likely take 30-45 minutes to complete. This will only be ran once, with Prog B being tested 8 days later. Prog B (8 days later) will involve participants running at maximal speeds for 30m in an outlined multidirectional manner. The 30m requested will involve periods of change of direction and/or acceleration/deceleration zones which will be outlined by cones and markers on the running field and will be guided by a running co-ordinator during the trial. Each 30m will again be followed by a 30m walk and will be repeated until 1500m running has been completed. This again will likely take 30-45 minutes to complete. The personnel involved in supervising these sessions will be A) the author - who will take neuromuscular measurements pre and post running. The author is a 6 year qualified and fully registered physiotherapist. B) a strength and conditioner who will watch all running and direct the players whilst running as to various times for walking and direction to the next stations. This is a MSc level qualified strength and conditioner
Sponsors
University of Bath, United Kingdom
Study design
Allocation
Non-randomised trial
Intervention model
Single group
Primary purpose
Educational / counselling / training
Masking
Open (masking not used)
Eligibility
Sex/Gender
Male
Age
18 Years to 20 Years
Healthy volunteers
Yes
Inclusion criteria
The player must be within the u20s academy squad for the 2015 season and must have had MSK clearance from the assessing physiotherapist prior to being invited for consideration of participation. Participants must also have clearance from the club prior to being invited – (after MSK screening has been completed)
Exclusion criteria
Failure of in-club musculoskeletal assessment Club have the right to withdraw a participate also if required Only players that would otherwise be involved in full contact/non-restricted/non-modified training sessions at the time which the study is being conducted will be selected as invitees for participation. Any player not given permission by the club will also be excluded, despite them being eligible based on MSK assessment. The parent club will have ultimate say on inclusion of the player in the outlined study.
Outcome results
None listed