The Effect of Goal Setting, Motivation, and Fitness Trackers on Daily Step Counts

Purpose: Wearable devices for tracking health and fitness-related activities are thought to motivate individuals to participate in regular exercise. It has been suggested that personal activity trackers can empower individuals to create and keep fitness goals. Therefore, this research was conducted to examine whether using a fitness tracking device in combination with working towards a given goal, self-reporting daily steps, and receiving motivational emails would increase physical activity. Methods: 44 participants (13 males, 31 females) were recruited and randomized into either an experimental (goal setting) or control group (n=22 per group). Participants reported step counts every day for four weeks using an online form. After the first week of data collection, daily step count averages were calculated and goals were given to participants in the experimental group, by adding 500 steps to their daily average. Participants were notified of this goal and sent motivational emails each week, while participants in the control group were not given a specific goal or motivation. Results: Week one step count averages were similar between groups (8460.9 ± 3329.8 steps for the control group and 8783.6 ± 4317.6 steps for the experimental group). Step counts declined in both groups across the three-week period. The week three average was 7731.8 ± 4231.5 steps for the control group and 7642.1 ± 4208.9 steps for the experimental group. Despite email encouragement in the experimental group, only 40.9 percent met their given goal in week one. By the third week, only 27.3 percent of participants in the experimental group met their goal, missing this goal by an average of 1595.88 ± 3294 steps. Participants reported that the use of these devices encouraged them to participate in physical activity (44.8 percent of the control group and 63.7 percent of the experimental group) despite the declining step count trend observed. 69.6 percent of the control group and 72.7 percent of the experimental group reported that they would continue to wear a fitness tracking device outside of the study. Conclusion: There was no significant difference between experimental and control groups with their adherence to the program and step count levels throughout each week. Both groups on average did not reach the widely accepted recommendation of 10,000 steps per day. Interestingly, the majority of participants reported that they still plan to use a fitness tracking device in the future and consider them to be a piece of motivational technology

Prevalence and Use of Fitness Tracking Devices within a College Community

Purpose: Wearable devices for tracking health and fitness related activities are thought to motivate individuals to participate in regular exercise. The purpose of this study was to examine the frequency of these wearable fitness tracking devices in a college setting. Methods: Students, faculty, administration, and staff of Linfield College were asked to complete a survey that examined the types of fitness tracking devices owned, frequency of use, and application of the device. Results: Of 217 participants surveyed (67 males, 150 females), 29.49% own a fitness tracker, with the most common types being a phone app (46.2% of faculty, staff, and administration) and a specific wearable wrist device (44.7% of students). Step count tracking was the most popularly used feature among all participants (86.8% of students and 96.2% of faculty, staff, and administration). 84% of all participants reported that the device encouraged their participation in physical activity. For those not owning a device (70.51% of participants), lack of interest was the most prevalent reason reported against purchasing a device, followed by expense. Conclusion: Our results suggest that a small percentage of individuals across a college community own fitness tracking devices, despite the fact that they are perceived to encourage physical activity

Lattice Calculation of Thermal Properties of Low-Density Neutron Matter with Pionless NN Effective Field Theory

Thermal properties of low-density neutron matter are investigated by determinantal quantum Monte Carlo lattice calculations on 3+1 dimensional cubic lattices. Nuclear effective field theory (EFT) is applied using the pionless single- and two-parameter neutron-neutron interactions, determined from the $^1S_0$ scattering length and effective range. The determination of the interactions and the calculations of neutron matter are carried out consistently by applying EFT power counting rules. The thermodynamic limit is taken by the method of finite-size scaling, and the continuum limit is examined in the vanishing lattice filling limit. The $^1S_0$ pairing gap at $T \approx 0$ is computed directly from the off-diagonal long-range order of the spin pair-pair correlation function, and is found to be approximately 30% smaller than BCS calculations with the conventional nucleon-nucleon potentials. The critical temperature $T_c$ of the normal-to-superfluid phase transition and the pairing temperature scale $T^\ast$ are determined, and the temperature-density phase diagram is constructed. The physics of low-density neutron matter is clearly identified as being a BCS-Bose-Einstein condensation crossover.Comment: 50 pages, 23 figures, to appear in Physical Review

Dispersive photoluminescence decay by geminate recombination in amorphous semiconductors

The photoluminescence decay in amorphous semiconductors is described by power law $t^{-delta}$ at long times. The power-law decay of photoluminescence at long times is commonly observed but recent experiments have revealed that the exponent, $delta sim 1.2-1.3$, is smaller than the value 1.5 predicted from a geminate recombination model assuming normal diffusion. Transient currents observed in the time-of-flight experiments are highly dispersive characterized by the disorder parameter $alpha$ smaller than 1. Geminate recombination rate should be influenced by the dispersive transport of charge carriers. In this paper we derive the simple relation, $delta = 1+ alpha/2$. Not only the exponent but also the amplitude of the decay calculated in this study is consistent with measured photoluminescence in a-Si:H.Comment: 18pages. Submitted for the publication in Phys. Rev.

Magnon-photon coupling in the noncollinear magnetic insulator Cu 2 OSeO 3

Anticrossing behavior between magnons in the noncollinear chiral magnet Cu2OSeO3 and a two-mode X-band microwave resonator was studied in the temperature range 5–100 K. In the field-induced ferrimagnetic phase, we observed a strong-coupling regime between magnons and two microwave cavity modes with a cooperativity reaching 3600. In the conical phase, cavity modes are dispersively coupled to a fundamental helimagnon mode, and we demonstrate that the magnetic phase diagram of Cu2OSeO3 can be reconstructed from the measurements of the cavity resonance frequency. In the helical phase, a hybridized state of a higher-order helimagnon mode and a cavity mode—a helimagnon polariton—was found. Our results reveal a class of magnetic systems where strong coupling of microwave photons to nontrivial spin textures can be observed