Sentences with phrase «muscle fiber proportion»

The studies to date suggest that the deltoid displays a mixed muscle fiber proportion.

These figures indicate that the deltoid displays a predominantly mixed muscle fiber proportion but may be slightly type I dominant.

The mean type II muscle fiber proportion was 44 ± 8 % across all 10 subjects.

The erector spinae displays a greater proportion of type I muscle fibers than type II muscle fibers, with type I muscle fiber proportion ranging between 63 — 73 % and 62 — 74 % in the lumbar and thoracic regions, respectively.

Strength training likely does not lead to a shift in type I to type II muscle fiber proportion.

Velocity - based training preserves type IIX muscle fiber proportion (Pareja - Blanco et al. 2016), while endurance exercise causes a shift from type IIX to type IIA.

Greater bodyweight, lower body fat percentage, greater type IIA muscle fiber proportion, and greater force producing ability per unit muscle cross-sectional area are all associated with superior Olympic weightlifting ability among Olympic weightlifters.

In marathon runners tapering from endurance running training, there appears to be no change in muscle fiber proportion, although alterations in function at the single fiber level have been noted (Trappe et al. 2006).

The rectus femoris displays a slight tendency towards a greater proportion of type II muscle fibers, with studies reporting a range between 30 — 50 % type I muscle fiber proportion (Jennekens et al. 1971; Johnson et al. 1973; Garrett et al. 1984).

Studies to data suggest that strength athletes are likely to display a greater proportion of type II muscle fibers than type I muscle fibers, while non-strength athletes are more likely to display a mixed muscle fiber proportion.

Strength training in untrained subjects causes a shift in muscle fiber proportion from type IIX to type IIA muscle fiber type, and may also produce similar effects in trained individuals.

Nevertheless, there does appear to be a difference in type IIA and type IIX muscle fiber proportion between strength and power athletes and their respective controls, with most studies reporting a greater proportion of type IIA, and a smaller proportion of type IIX fibers in the athletes (Klitgaard et al. 1990; Jürimäe et al. 1996; Fry et al. 2003a; Fry et al. 2003b; Shoepe et al. 2003; Kesidis et al. 2008) but again this is not seen entirely consistently (D'Antona et al. 2006).

Not exact matches

• SRK - 015 substantially increases lean body mass in non-human primates, with a particularly notable effect on muscles with a high proportion of fast - twitch fibers, a muscle fiber type that is particularly affected in SMA.

As for your muscle physiology, the relative proportion of fast twitch and slow twitch fibers in your muscles is also genetically predetermined, and slow twitch muscle fibers are able to consume more oxygen than fast twitch muscle fibers.

For example, sprinters usually have predominately Type IIB fast glycolytic muscle fibers, while distance runners have a larger proportion of slow - twitch, high oxidative muscle fibers.

Therefore, future research may discover that there is a greater proportion of fast twitch fibers in this muscle that was previously believed.

In general, endurance athletes tend to display a greater proportion of type I muscle fibers, as shown by early studies (Gollnick et al. 1972; Costill et al. 1979) and later investigations (Harber et al. 2004a).

There are some indications that similar programs can lead to a shift within the sub-types of type II muscle fibers, from type IIX to type IIA muscle fibers, as measured by muscle fiber type proportion.

On the other hand, the gastrocnemius comprises a mixture of type I and type II muscle fibers with a slight tendency towards a greater proportion of type I muscle fibers, with the proportion ranging between 50 — 76 % (Johnson et al. 1973; Edgerton et al. 1975; Dahmane et al. 2005; 2006; Keh - Evans et al. 2010).

On the other hand, there are some indications that strength training programs of < 6 months in untrained subjects can lead to a shift within the sub-types of type II muscle fibers, from type IIX to type IIA muscle fibers, as measured by muscle fiber type proportion.

Different muscles display different proportions of muscle fiber types.

In general, the proportion of type I muscle fibers does not differ substantially between athletes and controls (Klitgaard et al. 1990; Jürimäe et al 1996; Fry et al. 2003a; Fry et al. 2003b; Shoepe et al. 2003; Kesidis et al. 2008) but this is not seen entirely consistently (D'Antona et al. 2006).

Changes in muscle fiber type can be presented as either changes in the proportion of fibers of a given type, or as changes in the absolute or relative cross-sectional area of the fibers.

Therefore, the trapezius seems to display a mixed to slightly greater proportion of type I muscle fibers in non-strength athletes, while strength athletes may preferentially display a greater proportion of type II muscle fibers.

Strength training programs of < 6 months (e.g. Häkkinen et al. 2001; Häkkinen et al. 2003) in trained subjects do not lead to a shift between type I to type II muscle fibers, as measured by muscle fiber type proportion.

Among the lower body muscles, the plantar flexors display the highest proportion of type I muscle fibers, and the knee extensors display the lowest proportion of type I muscle fibers, as shown in the chart below, which presents the mean of the data from all currently available studies.

The shoulders are the only upper body muscle group that displays a tendency towards a higher proportion of type I muscle fibers (Jennekens et al. 1971; Johnson et al. 1973; Humphrey et al. 1982; Tesch et al. 1983; Mavidis et al. 2007; Srinivasan et al. 2007), while the pectoralis major (Johnson et al. 1973; Srinivasan et al. 2007) is mixed - fast twitch.

Overall, the upper body muscles display a tendency towards a lower proportion of type I muscle fibers compared to the lower body muscles.

Overall, it appears that the proportion of type I muscle fibers of the gastrocnemius ranges between 44 — 76 %.

Most studies indicate that strength training programs of standard durations (6 — 12 weeks) in trained subjects do not lead to a shift between type I to type II muscle fibers, as measured by muscle fiber type proportion, although the effect of longer programs is unknown.

The gastrocnemius muscles display a very high proportion of type I muscle fibers, ranging between 44 — 76 %.

A higher proportion of type II muscle fibers may therefore be beneficial for strength and power sports.

We say that muscle fiber type changes either when there is a shift in the isoforms observed in individual fibers (fiber type proportion), or when there is an change in the relative area occupied by each group of fibers.

The soleus displays an even higher proportion of type I muscle fibers, ranging between 70 — 96 %.

Type IIX muscle fibers are more common in untrained individuals than in trained individuals, and their proportion tends to increase with detraining (Hortobágyi et al. 2000).

They report the proportion of type I muscle fiber in the long and short head of the biceps was 39 % and 37 %, respectively.

They reported that the proportion of type I muscle fiber in the biceps was 39 %.

But they've got higher proportions of slow twitch muscle fiber.

Similarly, Gjovagg et al. (2008) performed a cohort study of male and female adults aged 22 years and found that the proportion of type I muscle fiber was 35 %.

Studies to date suggest that the triceps displays a greater proportion of type II muscle fibers than type I muscle fibers.

The pectoralis major is made up of a higher proportion of type II muscle fibers.

They found that the proportion of type I muscle fiber was 35 %, indicating that the triceps is relatively fast twitch in physical education students who perform well in the shot put.

Haggmark et al. (1979) found that the proportion of type I muscle fiber across the rectus abdominis, internal and external oblique was 55 — 58 %, although there was considerable inter-individual variability.

This belief came from a couple of older studies that showed a slightly greater proportion of type II muscle fibers in the hamstrings compared to other muscles.

They reported that the gluteus medius displayed a slightly greater (42 % type II and 58 % type I) proportion of type I than type II muscle fibers.

Muscles with a high proportion of type I fibers may benefit more from higher repetitions (lighter loads) or slower bar speeds, while muscles with a high proportion of type II fibers may benefit more from lower repetitions (heavier loads) or faster bar Muscles with a high proportion of type I fibers may benefit more from higher repetitions (lighter loads) or slower bar speeds, while muscles with a high proportion of type II fibers may benefit more from lower repetitions (heavier loads) or faster bar muscles with a high proportion of type II fibers may benefit more from lower repetitions (heavier loads) or faster bar speeds.

They reported the pectoralis major displayed a much greater proportion of type II muscle fibers than type I muscle fibers (65 % type II and 35 % type I).

Since the upper region appears to display slower contractile characteristics, it may have a greater proportion of type I muscle fibers.

Indeed, endurance athletes, who are generally able to perform a higher number of repetitions to failure in comparison with strength athletes (Desgorces et al. 2010; Panissa et al. 2013; Richens & Cleather, 2014) also tend to display a greater proportion of type I muscle fibers (Gollnick et al. 1972; Costill et al. 1979; Harber et al. 2004a).

Mandroukas et al. (2010) found that Greco - Roman wrestlers displayed a greater proportion (51 %) of type I muscle fibers compared with healthy (43 %) controls, who were more type II dominant.