Document Detail

Exercise and quadriceps muscle cooling time.
MedLine Citation:
PMID:  16404445     Owner:  NLM     Status:  PubMed-not-MEDLINE    
CONTEXT: Cryotherapy is commonly used for a variety of purposes; however, the body's response to cryotherapy immediately postexercise is unknown.
OBJECTIVE: To investigate the effect of prior exercise on crushed-ice-bag treatment of a large muscle group.
DESIGN: 2 x 3 repeated-measures design on depth (1 cm and 2 cm below adipose tissue) and treatment (exercise followed by ice, exercise followed by no ice, and no exercise followed by ice).
SETTING: Sports Injury Research Laboratory.
PATIENTS OR OTHER PARTICIPANTS: Six physically active, uninjured male volunteers.
INTERVENTION(S): For the 2 exercise conditions, subjects rode a stationary cycle ergometer at 70% to 80% of their age-predicted maximum heart rate, as calculated by the Karvonen method. For the no-exercise condition, subjects lay supine on a treatment table. The cryotherapy treatment consisted of a 1-kg ice bag applied to the anterior mid thigh. For the no-ice condition, subjects lay supine on a treatment table.
MAIN OUTCOME MEASURE(S): Time required for the intramuscular temperatures at the 1-cm and 2-cm depths below adipose tissue to return to pre-exercise baseline and time required to cool the 1-cm and 2-cm depths to 10 degrees C below the pre-exercise temperature.
RESULTS: The time to cool the rectus femoris to the pre-exercise temperature using a crushed-ice-bag treatment was reduced by approximately 40 minutes (P < .001). The ice bag cooled the 1-cm and 2-cm depths to the pre-exercise temperature within 7 minutes (P = .38), but the 2-cm tissue depth took nearly 13.5 minutes longer to cool than the 1-cm depth when no ice was applied (P = .001). The 1-cm depth cooled to 10 degrees C below the pre-exercise temperature about 8 minutes sooner than the 2-cm depth, regardless of whether the tissue was exercised or not (P < .001). Exercise shortened the cooling time to 10 degrees C below the pre-exercise temperature by approximately 13 minutes (P = .05).
CONCLUSIONS: Exercise before cooling with a crushed-ice bag enhanced the removal of intramuscular heat.
Blaine C Long; Mitchell L Cordova; Jody B Brucker; Timothy J Demchak; Marcus B Stone
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of athletic training     Volume:  40     ISSN:  1062-6050     ISO Abbreviation:  J Athl Train     Publication Date:    2005 Oct-Dec
Date Detail:
Created Date:  2006-01-11     Completed Date:  2006-02-13     Revised Date:  2011-07-28    
Medline Journal Info:
Nlm Unique ID:  9301647     Medline TA:  J Athl Train     Country:  United States    
Other Details:
Languages:  eng     Pagination:  260-3     Citation Subset:  -    
Brigham Young University, Provo, UT 84602, USA.
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Comment In:
J Athl Train. 2006 Oct-Dec;41(4):364-70   [PMID:  17273459 ]

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