Go Back   Catalyst Athletics Forums > Training > Fitness, Strength & CrossFit

Reply
 
Thread Tools Display Modes
Old 11-10-2006, 09:27 AM   #1
Greg Everett
Administrator
 
Greg Everett's Avatar
 
Join Date: Oct 2006
Posts: 1,750
Default Spot Reduction?

Am J Physiol Endocrinol Metab (September 19, 2006).
doi:10.1152/ajpendo.00215.2006

Are blood flow and lipolysis in subcutaneous adipose tissue influenced by contractions in adjacent muscles in humans?

Bente Stallknecht1, Flemming Dela1, and Jorn Wulff Helge
University of Copenhagen, Copenhagen, Denmark

Aerobic exercise increases whole-body adipose tissue lipolysis, but is
lipolysis higher in subcutaneous adipose tissue (SCAT) adjacent to contracting muscles than in SCAT adjacent to resting muscles? Ten healthy, overnight-fasted males performed one-legged knee extension exercise at 25% of maximal workload (W max) for 30 minutes followed by exercise at 55% Wmax for 120 minutes with the other leg and finally exercised at 85% Wmax for 30 minutes with the first leg.

Subjects rested for 30 minutes between exercise periods. Femoral SCAT blood
flow was estimated from washout of 133Xe and lipolysis was calculated from
femoral SCAT interstitial and arterial glycerol concentrations and blood flow.

In general, blood flow as well as lipolysis was higher in femoral SCAT adjacent to contracting than adjacent to resting muscle (time 15-30 min: blood flow: 25% Wmax: 6.6 1.0 vs. 3.9 0.8 ml 100 g-1 min-1, P < 0.05; 55% Wmax: 7.3 0.6 vs. 5.0 0.6, P < 0.05; 85% Wmax: 6.6 1.3 vs. 5.9 0.7, P > 0.05; lipolysis: 25% Wmax: 102 19 vs. 55 14 nmol 100 g-1 min-1, P = 0.06; 55% Wmax: 86 11 vs. 50 20, P > 0.05; 85% Wmax: 88 31 vs. -9 25, P < 0.05).

In conclusion, blood flow and lipolysis are generally higher in SCAT adjacent to contracting than adjacent to resting muscle irrespective of exercise intensity. Thus, specific exercises can induce "spot lipolysis" in adipose tissue.
__________________
Olympic Weightlifting: A Complete Guide for Athletes & Coaches

"Without a doubt the best book on the market about Olympic-style weightlifting." - Mike Burgener, USAW Senior International Coach

American Weightlifting: The Documentary
Catalyst Athletics
Performance Menu Journal
Greg Everett is offline   Reply With Quote
Old 11-10-2006, 01:06 PM   #2
Robb Wolf
Senior Member
 
Robb Wolf's Avatar
 
Join Date: Oct 2006
Posts: 1,444
Default

Nein-scheisse! Interesting.
__________________
"Survival will be neither to the strongest of the species, nor to the most intelligent, but to those most adaptable to change."
C. Darwin

Robb's Blog
Robb Wolf is offline   Reply With Quote
Old 11-10-2006, 02:07 PM   #3
Greg Everett
Administrator
 
Greg Everett's Avatar
 
Join Date: Oct 2006
Posts: 1,750
Default

indeed. but i do wonder what the results would be with other locations... i.e., is there generally greater lypolisis in the leg area regardless of exercise? less in the abdominal area? etc. i don't see this as proof, but it does beg further research.
__________________
Olympic Weightlifting: A Complete Guide for Athletes & Coaches

"Without a doubt the best book on the market about Olympic-style weightlifting." - Mike Burgener, USAW Senior International Coach

American Weightlifting: The Documentary
Catalyst Athletics
Performance Menu Journal
Greg Everett is offline   Reply With Quote
Old 11-10-2006, 05:10 PM   #4
Jeremy Jones
Senior Member
 
Jeremy Jones's Avatar
 
Join Date: Oct 2006
Posts: 181
Default

Does this mean that those ab machines really do give you "SIX PACK ABS"?



I don't believe it.
__________________
-Jeremy Jones
www.diablocrossfit.com
Jeremy Jones is offline   Reply With Quote
Old 11-15-2006, 05:07 PM   #5
Neal Winkler
Senior Member
 
Join Date: Oct 2006
Posts: 326
Default

Fascinating, I'll definately be taking a closer look at that study later.
Neal Winkler is offline   Reply With Quote
Old 11-15-2006, 06:55 PM   #6
Steve Shafley
Senior Member
 
Join Date: Oct 2006
Posts: 1,285
Default

If it's the same on Alwyn Cosgrove was talking about, then the miniscule amounts of spot reduction that occur are, uh, well miniscule.
Steve Shafley is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




All times are GMT -7. The time now is 03:52 AM.

Powered by vBulletin® Version 3.8.9 Beta 3
Copyright ©2000 - 2014, vBulletin Solutions, Inc.