Chroom picolinaat nog waardelozer dan ik dacht!

[Big'r]

Ik had verwacht dat er wel een soort balans zou zijn tussen vroegere studies die een positief effect zagen en nieuwere onderzoeken die die niet bevestigen.

Ik heb echter geen 1 positieve studie kunnen!

Resistive training and chromium picolinate: effects on inositols and liver and kidney functions in older adults.
Thirty-two nondiabetic subjects, age 62 +/- 4 y, performed RT twice weekly for 12 wk and consumed either 924 ug Cr/d as Cr-pic (n = 17) or a placebo (n = 15). Whole-body strength increased in all subjects by 20 % (CR101).

Effects of resistive training and chromium picolinate on body composition and skeletal muscle size in older women.
Percent body fat and fat-free mass were unchanged with RT in these weight-stable women, independent of Cr-pic supplementation. Type I and type II muscle fiber areas of the m. vastus lateralis were not changed over time and were not influenced by Cr-pic supplementation (CR102).

Effect of chromium supplementation and exercise on body composition, resting metabolic rate and selected biochemical parameters in moderately obese women following an exercise program.
Twelve weeks of 400 microg/day of chromium as a CP supplement did not significantly affect body composition, RMR, plasma glucose, serum insulin, plasma glucagon, serum C-peptide and serum lipid concentrations or iron and zinc indices in moderately obese women placed on an exercise program. The changes in serum total cholesterol levels and TIBC were a result of the exercise program (CR103).

The effect of chromium picolinate on muscular strength and body composition in women athletes.
Fifteen women softball athletes were randomly divided into 2 groups, the chromium treatment group (n = 8) and the placebo control group (n = 7).
The CrPic supplementation consisted of a 500 ug dosage taken once per day. All participants trained 3 times per week with 2-3 sets of 8-12 repetitions at 80% of 1 repetition maximum (1RM) using variable resistance machines and free weights. No significant (p < 0.05) differences in muscular strength or body composition were found after 6 weeks of resistance training (CR104).

Effects of carbohydrate and chromium ingestion during intermittent high-intensity exercise to fatigue.
The data confirm an ergogenic benefit of ingesting CHO during exercise designed to imitate sports like basketball, soccer, and hockey, but do not support the hypothesis that the addition of Cr would enhance this effect (CR105).

Effect of resistance training with or without chromium picolinate supplementation on glucose metabolism in older men and women.
The effect of 12 weeks of resistance training (RT) with or without chromium picolinate (Cr-pic) supplementation on glucose tolerance was assessed in moderately overweight older men and women (age, 62 +/- 4 years; body mass index [BMI], 29.1 +/- 2.5 kg/m2).
High-dose Cr-pic supplementation had no effect on any measure of glucose metabolism during RT (CR106).

Effects of resistance training and chromium picolinate on body composition and skeletal muscle in older men.
18 men (age range 56-69 yr). The men were randomly assigned (double-blind) to groups (n = 9) that consumed either 17.8 micromol Cr/day (924 microg Cr/day) as CrPic or a low-Cr placebo for 12 wk while participating twice weekly in a high-intensity RT program.
High-dose CrPic supplementation did not enhance muscle size, strength, or power development or lean body mass accretion in older men during a RT program, which had significant, independent effects on these measurements (CR107).

Chromium picolinate effects on body composition and muscular performance in wrestlers.
Chromium picolinate supplementation coupled with a typical preseason training program does not enhance body composition or performance variables beyond improvements seen with training alone (CR108).

Hier werden niet-trainende vrouwen zelfs dikker:

Chromium and exercise training: effect on obese women.
We conclude that high levels of chromium picolinate supplementation are contraindicated for weight loss in young, obese women (CR109).

Chromium supplementation and resistance training: effects on body composition, strength, and trace element status of men.
The effects of 8 wk of daily chromium supplementation (3.3-3.5 mumol as chromium chloride or chromium picolinate) or placebo (0.1 mumol Cr) and weight training were examined in 36 men in a double-blind design.
Routine chromium supplementation has no beneficial effects on body- composition change or strength gain in men (CR110).

Effects of chromium picolinate on body composition.
The study employed a double-blind, placebo-controlled protocol and lasted for 16 weeks.
400 micrograms chromium picolinate or a placebo were distributed to healthy, active-duty Navy personnel (79 men, 16 women).
chromium picolinate was ineffective in enhancing body fat reduction in this group (CR111).

Effects of chromium picolinate supplementation on body composition, strength, and urinary chromium loss in football players.
Chromium picolinate supplementation was ineffective in bringing about changes in body composition or strength during a program of intensive weight-lifting training (CR112).

Alleen de laatste studie laat een effect zien op het lichaamsgewicht van vrouwen, maar niet mannen. Maar wordt hier spiermassa of vet bedoelt.......?

Effects of chromium picolinate on beginning weight training students.
Changes in body weight (BW), a sum of three body circumferences (sigma C), a sum of three skinfolds (sigma SF), and the one-repetition maximum (1RM) for the squat (SQ) and bench press (BP) were examined in 59 college-age students (37 males [M], 22 females [F]) over a 12-week weight lifting program. Using a double-blind protocol, half of the students were given 200 micrograms/day chromium (Cr) in the form of chromium picolinate (CrPic) while the other half received a placebo (P).
The only significant treatment effect found was due to the F-CrPic group gaining more BW (p = 0.0048) than the other three groups. It was concluded that CrPic supplementation had a greater effect on the females than on the males (CR113).

REFERENTIES

CR101)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR102)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR103)http://www.jacn.org/cgi/content/full/20/4/293
CR104)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR105)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR106)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR107)http://jap.physiology.org/cgi/content/full/86/1/29
CR108)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR109)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR110)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR111)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR112)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1
CR113)http://www.ncbi.nlm.nih.gov/entrez....ry_hl=1

 

[boerenkool]

Het is toch al jaren bekend dat chroompicolinaat waardeloos is?

 

[Marter]

Chroom gtf is niet gelijk aan chroompicolinaat maar is ook chroom.
Dus gewoon dezelfde werking?

Aan de onderzoeken te zien zou het niet werken...
Is er al iets nieuws uit de bus gekomen?

 

[Marc W]

Wat zou het moeten doen dan? Ik geloof dat ik het een keer heb zien staan tussen de afslankmiddelen?

 

[Marter]

Je lichaam optimaal gevoelig maken voor insuline dus zou je in theorie minder vet moeten aanzetten bij hetzelfde dieet.