handdator

Visa fullständig version : En stilla undran...


130kg finsk sisu
2008-09-16, 19:57
Skall droppa något kilo fett nu utan att tappa i styrka. Så jag har en fråga som är rätt löjlig men jag ställer den.
Kan man punktförbränna fett? t.ex. träna mycket mage och bränna just bukfett?

King Grub
2008-09-16, 20:05
Ja, det kan man, men det är så försvinnande små mängder det handlar om som skiljer sig, att det inte har någon praktisk betydelse.

http://www.kolozzeum.com/forum/showthread.php?t=79152&highlight=punktf%F6rbr%E4nning

Ungrim
2008-09-16, 20:06
Jag skulle precis svara nej, men om vi ska hård dra det och räkna milligram så vist går det.

130kg finsk sisu
2008-09-16, 20:10
Nu kommer en ännu konstigare undran.
Jag har mycket vältränade magmuskler men även en stor fettmassa. Har jag "större" förmåga då att punktförbränna?

King Grub
2008-09-16, 20:14
Vet inte, men oavsett handlar det om, kanske, 1000 sit-ups för något gram extra förbränt fett på det området.

regus
2008-09-16, 20:14
Är det här lite av en leva på hoppet-tråd? ;)

130kg finsk sisu
2008-09-16, 20:19
Nja inte vet jag om det är en leva på hoppet tråd. Tänkte bara hur jag skall lägga upp bukträningen. Om jag skall satsa på tyngre set eller köra som nu dvs högreps.
Hur som helst är det bra att träna mage men ännu viktigare att bänka mycket!

Sniggel
2008-09-18, 10:25
Kör du inte redan en hel del fitness-övningar för magen, tänker på youtube :D

OnT: Tror nog att det är lika bra att sluta fundera på punktförbränningen då det inte kommer spela någon roll i praktiken hur du lägger upp det. Som sagt, cirka 1g per 1000 situps eller nåt i den stilen.

Morty
2008-09-29, 18:08
Lite old, men fett-i-magen (Vaskulärt?) bränns till större grad vid lågintensiv träning än vid bara kalorirestriktion.

Pepz
2008-09-29, 18:13
Lite old, men fett-i-magen (Vaskulärt?) bränns till större grad vid lågintensiv träning än vid bara kalorirestriktion.


Menar du visceralt fett kanske?

Eddie Vedder
2008-09-29, 18:29
Lite old, men fett-i-magen (Vaskulärt?) bränns till större grad vid lågintensiv träning än vid bara kalorirestriktion.

En viktminskning som sker i samband med träning ger bättre effekt på viskeralt fett, högintensiv konditionsträning ger bättre effekt än lågintensiv.

Dexterity
2008-09-29, 19:08
högintensiv konditionsträning ger bättre effekt än lågintensiv.

Du har säkert helt rätt, men...

Högintensiv konditionsträning innebär ju att man tränar med dålig tillgång till syre.Eftersom mitokondrierna behöver god tillgång till syre för att använda fett som energikälla bör då inte lågintensiv konditionsträning vara mer fettförbrännande än högintensiv sådan?

Detta är vad jag har läst, men har ingen aning om det stämmer. Kan du förklara lite mer utförligt?

King Grub
2008-09-29, 19:12
Lågintensiv träning förbrukar procentuellt mer fett, men mindre total mängd fett.

http://jap.physiology.org/cgi/content/full/92/3/1045

http://www.ncbi.nlm.nih.gov/pubmed/8883001

It has been suggested that exercise has preferential effects on visceral fat reduction. However, the dose-response effect remains unclear because of limited evidence from individual studies.

The purpose of this study was to systematically review the current literature to establish whether reduction of visceral fat by aerobic exercise has a dose-response relationship.

A database search was performed (PubMed, 1966-2006) with appropriate keywords to identify studies exploring the effects of aerobic exercise as a weight loss intervention on visceral fat reduction. Visceral fat reduction was expressed as the percentage of visceral fat change per week (%DeltaVF/w). The energy expenditure by aerobic exercise was expressed as summation operator(metabolic equivalents x h per week (METs.h/w)).

Nine randomized control trials and seven non-randomized control trials were selected. In most of the studies, the subjects performed aerobic exercise generating 10 METs.h/w or more.

Among all the selected groups (582 subjects), visceral fat decreased significantly (P<0.05) in 17 groups during the intervention, but not in the other 4 groups.

There was no significant relationship between METs.h/w from aerobic exercise and %DeltaVF/w in all the selected groups. However, when subjects with metabolic-related disorders were not included (425 subjects), METs.h/w from aerobic exercise had a significant relationship with %DeltaVF/w (r=-0.75).

Moreover, visceral fat reduction was significantly related to weight reduction during aerobic exercise intervention, although a significant visceral fat reduction may occur without significant weight loss.

These results suggest that at least 10 METs.h/w in aerobic exercise, such as brisk walking, light jogging or stationary ergometer usage, is required for visceral fat reduction, and that there is a dose-response relationship between aerobic exercise and visceral fat reduction in obese subjects without metabolic-related disorders.

Int J Obes (Lond). 2007 Jul 17; A dose-response relation between aerobic exercise and visceral fat reduction: systematic review of clinical trials.

Eddie Vedder
2008-09-29, 20:09
Objective: To determine the effects of a 15-week high-intensity intermittent exercise (HIIE) program on subcutaneous and trunk fat and insulin resistance of young women.

Design and procedures: Subjects were randomly assigned to one of the three groups: HIIE (n=15), steady-state exercise (SSE; n=15) or control (CONT; n=15). HIIE and SSE groups underwent a 15-week exercise intervention.

Subjects: Forty-five women with a mean BMI of 23.22.0 kg m-2 and age of 20.22.0 years.

Results: Both exercise groups demonstrated a significant improvement (P<0.05) in cardiovascular fitness. However, only the HIIE group had a significant reduction in total body mass (TBM), fat mass (FM), trunk fat and fasting plasma insulin levels. There was significant fat loss (P<0.05) in legs compared to arms in the HIIE group only. Lean compared to overweight women lost less fat after HIIE. Decreases in leptin concentrations were negatively correlated with increases in VO2peak (r=-0.57, P<0.05) and positively correlated with decreases in TBM (r=0.47; P<0.0001). There was no significant change in adiponectin levels after training.

Conclusions: HIIE three times per week for 15 weeks compared to the same frequency of SSE exercise was associated with significant reductions in total body fat, subcutaneous leg and trunk fat, and insulin resistance in young women.

http://www.nature.com/ijo/journal/v32/n4/full/0803781a.html

The effects of high-intensity intermittent exercise training on fat loss and fasting insulin levels of young women. International Journal of Obesity (2008) 32, 684–691

Summary
The purpose of this study was to investigate differences in fat metabolism between visceral fat obese (VF-Ob) and abdominal subcutaneous obese (SF-Ob) men during “high-intensity endurance exercise”. Fourteen obese (body mass index >25 kg/m2) men were classified into two groups according to visceral fat area using computed tomography; i.e., VF-Ob (n = 7; mean age, 52.0 ± 2.5 year) and SF-Ob (n = 7; mean age, 57.3 ± 2.8 year) groups. Plasma fat concentration and fat oxidation were measured at rest and during 60-min high-intensity (70% of peak oxygen uptake) stationary cycling exercise. Plasma concentrations of free fatty acid and glycerol were significantly higher (P ≤ 0.05) in VF-Ob men compared with SF-Ob men during endurance exercise. However, no significant difference was found in fat oxidation between VF-Ob and SF-Ob men (697 ± 135 and 661 ± 96 kJ/h, respectively) during high-intensity endurance exercise. These results suggest that obesity phenotype affects plasma fat concentration even during high-intensity exercise. It is likely that plasma fat concentrations in visceral fat obese men during high-intensity endurance exercise are more increased compared with during moderate-intensity endurance exercise. Despite the difference in plasma fat concentration, total fat oxidation was similar in the two obese phenotypes.

http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B82Y1-4R5H272-3-9&_cdi=33045&_user=651519&_orig=search&_coverDate=12%2F31%2F2007&_sk=999989995&view=c&wchp=dGLzVlz-zSkzk&md5=28929fc6ee97413a348c97f79dc58cd7&ie=/sdarticle.pdf

Plasma fat concentration increases in visceral fat obese men during high-intensity endurance exercise. Obesity Research & Clinical Practice (2007) 1, 273—279

Objective: To determine if hypocaloric diet, diet plus low-intensity exercise, and diet plus high-intensity exercise differentially influence subcutaneous abdominal and gluteal adipocyte size in obese individuals.

Design: Longitudinal intervention study of hypocaloric diet, diet plus low-intensity exercise, and diet plus high-intensity exercise (calorie deficit=2800 kcal/week, 20 weeks).

Subjects: Forty-five obese, middle-aged women (BMI=33.00.6 kg/m2, age=581 years).

Measurements: Body composition testing and adipose tissue biopsies were conducted before and after the interventions. Subcutaneous abdominal and gluteal adipocyte size was determined.

Results: All three interventions reduced body weight, fat mass, percent fat, and waist and hip girths to a similar degree. Diet only did not change subcutaneous abdominal adipocyte size, whereas both diet plus exercise groups significantly reduced abdominal adipocyte size. Changes in abdominal adipocyte size in the diet plus exercise groups were significantly different from that of the diet group. Gluteal adipocyte size decreased similarly in all three groups.

Conclusion: Addition of exercise training to dietary weight loss preferentially reduces subcutaneous abdominal adipocyte size in obese women. This may be of importance for the treatment of health complications associated with subcutaneous abdominal adiposity.

http://www.nature.com/ijo/journal/v30/n8/full/0803245a.html

Addition of aerobic exercise to dietary weight loss preferentially reduces abdominal adipocyte size. International Journal of Obesity (2006) 30, 1211–1216.