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What is the difference between ASU Sync, iCourses and ASU Online?

July 9, 2020

We answer some questions about the new learning environment called ASU Sync

As ASU students prepare to head back to campus for the fall 2020 semester, we break down the details of the new learning environment called ASU Sync and how it is different from both iCourses and ASU Online.

ASU Sync and iCourses are offered to those enrolled as on-campus students. The easiest way to tell the difference is to look at the Location column in the course catalog, ASU Class Search. In-person classes (which ASU Sync is part of) will list a physical classroom; iCourses will have "iCourse" as their location.

ASU Online courses are most similar to iCourses in how they are delivered (entirely online). However, they are separate enrollment options using different course catalogs. On-campus students cannot take ASU Online courses, and ASU Online students cannot take iCourses (or in-person classes).

Learn more about each learning experience below.

ASU Sync

ASU Sync combines live Zoom lectures with in-the-classroom instruction. Students enrolled in in-person classes will attend classes both in person and via ASU Sync (Zoom). Sometimes students will need to attend class via ASU Sync for distancing reasons (keeping classrooms below a certain capacity), and other times students will utilize ASU Sync for health concerns or because they cannot be on campus due to travel restrictions.

The overwhelming majority of in-person courses will have an ASU Sync option (the exceptions are explained below); ASU Sync is already built-in, with no need to "opt in" for it. Students will access the ASU Sync option from their My ASU course list; the week before classes begin, each class listed under View My Schedule will have buttons next to them that allow students to launch a live ASU Sync session.

 Things to know about ASU Sync:

  • Every student in a class will participate in every class: Some will do so in person in the classroom; others will be participating in real time, via Zoom. 
  • To accommodate social distancing, professors will create a schedule for students on who attends in-person vs. remotely. For example, if you sign up for a Tuesday/Thursday class, your professor may assign you to come in person on Tuesdays and attend remotely on Thursdays. Professors will contact enrolled students in August to inform them how their specific class will be taught and managed.
  • Some classes (like performing arts or science labs) will be in-person only. For classes that will be offered in-person only, you will see a gray, "In-Person Only" tag to the right of the course name in your My ASU semester schedule. Additional instructions for students enrolled in classes that will meet in-person only can be found in the Special Notes section of the class details.
  • July 21 update: Some classes, primarily those with enrollment of 100 students or more, will only be via ASU Sync, without the in-person component. Those are labeled "ASU Sync Only" in the class list in My ASU.

MORE: Register for upcoming webinars or watch previous ones on the ASU Sync page


These courses are designed to be taken entirely online, for the duration of the semester. They feature recorded lectures and other content, which students can watch and utilize on their own schedule. 

Over 2,400 iCourses are available. On-campus students can find and register for an iCourse by filtering by campus location in ASU Class Search. The link to the online coursework will be available via the class list on My ASU.

ASU Online

ASU Online is a separate enrollment system.

Things to know about ASU Online:

  • ASU Online classes are not ASU Sync classes or iCourses. They have different course catalogs.
  • ASU Online courses are 100% remote learning, as they always have been.
  • On-campus students cannot sign up for ASU Online courses.

More resources: 

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See full-size, zoom-able PDF of the above graphic.

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Why hydration is so important when hiking in the heat of summer

July 9, 2020

You don’t have to be an experienced trailblazer to know that if you choose to hike in the heat, you better be hydrated. Yet scientific literature on the subject reports that roughly 25% of heat-related illness cases are a result of a fluid imbalance, rather than heat exposure alone.

New research out of Arizona State University seeks to understand exactly what is going on in the body as it responds to heat stress, looking in particular at hydration levels, core temperature and sweat loss, in the hopes of developing interventions and best practices for those whose mountainous wanderlust just can’t be quenched.

The findings of one such related study, recently published in the International Journal of Environmental Research and Public Health, show that compared to moderate weather conditions, hikers’ performance during hot weather conditions was indeed impaired, resulting in slower hiking speeds and prolonged exposure to the elements, thus increasing their risk of heat-related illness.

Hydration infographic

Perhaps most telling, though, the research team found that most hikers did not bring enough fluid with them on their hike to compensate for their sweat loss. They also found that less aerobically fit participants were most negatively affected by heat stress and performed worse overall compared to their more aerobically fit counterparts.

“The current guidelines for hikers in general are very broad and geared more toward safety than quantifying the adequate amount of fluid they need,” said ASU College of Health Solutions Assistant Professor Floris Wardenaar, corresponding author on the paper. “The guidelines also do not take into account fitness levels or the importance of incremental exposure to the heat, which can be affected by acclimatization to specific environments and weather conditions.”

MORE: Are you drinking enough water?

Former College of Health Solutions master’s degree students Joshua Linsell and Emily Pelham are the first and second authors of the paper, followed by School of Geographical Sciences and Urban Planning Assistant Professor David Hondula and Wardenaar.

In their study, 12 participants — seven women and five men in their 20s — were asked to hike “A” Mountain on a moderate day (68 degrees Fahrenheit) and then again on a hot day (105 degrees Fahrenheit). They were told to prepare as they normally would, bringing however much fluid they thought they would need, and were asked to hike as quickly as possible without becoming uncomfortable. Each time, they hiked up and down the mountain four times, which adds up to roughly the same distance and incline as Camelback Mountain, one of the most popular hiking destinations in the Phoenix area that sees its fair share of heat-related illness cases.

Before their trek, participants’ resting metabolism was recorded to estimate their energy production during the hike. Their weight, heart rate, core temperature and hydration status were measured before and after the hike, and their drinking behavior – how much or how little fluid they consumed – was monitored throughout.

Using that data, researchers were able to calculate participants’ rate of sweat loss through their bodyweight reduction, which averaged out to about 1%, whether conditions were hot or moderate.

“The 1% bodyweight reduction had different reasons,” Wardenaar said. “During hot conditions, participants' sweat rates were higher while drinking more, often resulting in consuming all of the fluid brought, whereas during moderate conditions, sweat rates were lower, but participants drank less. A 1% bodyweight loss is considered manageable and not likely to result in detrimental performance decline. My concern is that when people hike longer than 80 to 90 minutes in hot conditions that they will not bring enough fluid, resulting in larger bodyweight losses.”

Overall, compared to moderate conditions, hot conditions significantly impaired hiking performance by 11%, reduced aerobic capacity by 7%, increased rate of perceived exertion by 19% and elevated core temperature. On average, participants took about 20 minutes longer to complete the hike during hot conditions than during moderate conditions, which theoretically could exponentially increase the chance of developing heat-related illness.

“Heat slows you down,” Wardenaar explained. “This means that what you normally can hike in 75 minutes under moderate conditions may take up to 95 minutes in the heat. That is something that people should take into account, especially when their hike will substantially exceed the 90 minute cut-off.”

Based on their findings, Wardenaar suggests preparing for a hike by familiarizing yourself with your personal hydration needs. You can do so by multiplying your weight before the hike by .01, then subtracting your weight after your hike from your starting weight. If the difference between your starting weight and your ending weight is greater than the product of your starting weight multiplied by .01, you need to be drinking more fluid during your hike.

Hydration infographic

It’s also important to be well-hydrated before you even get out on the trail, Wardenaar said. And avoid alcohol, as it can contribute to dehydration.

Next up, Wardenaar and his team from the Athleat Field Lab plan to use these findings to inform a new study, partly funded by Arizona Parks and Trails. They will look at a larger group of hikers and delve deeper into the behavioral reasons behind fluid intake, or lack thereof, and test possible intervention methods, such as viewing an informational video on hydration before taking a hike. Depending on the results, this type of video could be used in the future to inform hikers at trailheads via a QR code on their smartphone or other technological means about how much fluid they should be ingesting based on factors like current weather conditions, trail difficulty and personal fitness levels.

Graphics by Alex Davis/ASU Media Relations and Strategic Communications. Top photo courtesy of Pixabay.