After changing into his new jumpsuit (which was surprisingly comfortable), Izuku began to search for a place to train. Remembering the small map of the ship from earlier, Izuku went down to the second level of the ship in search of the gym room. Luckily, the gym room was right next to the elevator platform. Stepping into the room, Izuku looked around curiously at the range of exercise equipment. While the room itself was not the biggest, all of the equipment was brand new and top of the line. There was everything from punching bags to rowing machines, and in the back there was even a small padded area obviously meant to be used for sparring.

A little lost as to what he should start with, Izuku nearly jumped out of his skin when the door to the gym slid open to reveal Tetsutetsu.

"Hey man." Tetsutetsu said in a friendly manner. "You lookin to work out?"

Izuku nodded shyly and gestured to his skinny arms. "Yeah, I figured if I wanted to keep up with everyone I should put on some more muscle."

Smiling excitedly, Tetsutetsu nodded in agreement. "For sure! If you want I can show you how most of the stuff works. We could even be workout buddies if you wanted."

Thankful that Tetsutetsu was so accepting of him, Izuku smiled a little and nodded gratefully. "Thanks Tetsutetsu, I appreciate it."

Tetsutetsu laughed as he rubbed the back of his head bashfully. "No problem man! It's always nice to have someone help you out when you are new to something. Now let's get started! First off, we need to warm-up and do some stretches!"

Taking off his engineer coveralls to reveal a black tank top and workout shorts, Tetsutetsu guided Izuku through a basic warm-up routine. Then, once the two were warmed up, Tetsutetsu began showing Izuku the ins and outs of the different workout machines. Eventually, Izuku understood enough to begin. Climbing onto a treadmill, Izuku turned the machine and began jogging at a moderate pace while Tetsutetsu used a rowing machine. After working up a bit of a sweat on the treadmill, Izuku moved on to the chest press machine while Tetsutetsu used the leg curl machine. Eventually, Tetsutetsu suggested that each of them take turns on the weight bench.

While it might seem like a simple piece of equipment, weight bench technology had advanced greatly over the centuries. Unlike the primitive device of the twenty and twenty-first centuries, weight benches were now one of the safest pieces of exercise equipment to use. Instead of bulky weights, a modern weight bench used advanced gravitational technology to simulate weight. The bar itself was an advanced piece of technology, featuring hand grips that read vital signs, and safety systems that engaged repulsor drives in the bar in case someone lost their grip. Of course there were always the rebellious few who disabled all the fail-safes in search of a more "authentic" experience, but those muscleheads never usually lasted long anyways.

Laying down on the bench, Tetsutetsu explained the controls to Izuku who watched curiously. Activating the machine, Tetsutetsu set the weight to an impressive amount and began bench-pressing. Izuku watched in awe as the young engineer slowly but steadily lifted the weight bar several times. Finally, Tetsutetsu set the bar back in its holder with a clang and sat up to wipe the beads of sweat from his forehead.

"And that's how you do it." Tetsutetsu said slightly out of breath.

"That is really cool!" Izuku said honestly. "I didn't know exercise equipment like this existed. I am just used to seeing the old-fashioned stuff in holovids."

Tetsutetsu chuckled as he stood up and grabbed a bottle of water from a nearby dispenser. "Yeah, that's because it looks cooler when a guy is benching giant weights instead of an empty bar." Taking a sip of his water, the gray-haired teen quickly wiped down the bench then gestured for Izuku to try. "Why don't you take a turn Midoriya? I can spot you."

Nodding slightly nervously, Izuku laid down on the bench and put his hands on the outlined grips. After a few seconds of calibrating the weight bar beeped to signal the appropriate amount of gravitational weight was ready. Using all of his meagre strength, Izuku lifted the bar up and slowly lowered it.

"Go slow and steady." Tetsutetsu advised. "Don't worry about how many reps you can do, just get used to handling the weight."

His arms burning from the exertion, Izuku grunted an affirmative and pushed the bar back up. Repeating the process three more times, Izuku felt his arms begin to tremble and after one final set he set the weight bar back in the holder with a clang.

"Nice job man!" Tetsutetsu said enthusiastically as he extended a helping hand to Izuku. "Once you get the proper form you will find it much easier. Just don't expect to get swole overnight. Exercising takes patience and diligence to achieve results."

Gripping Tetsutetsu's hand with his own, Izuku let himself be hauled to his feet before rubbing his sore arms.

"You were not kidding, that was hard." Izuku wheezed. "I hope one day I can bench even half as much as you."

Grinning proudly, Tetsutetsu slapped Izuku on the back. "You will get there man, it just takes time. Anyways, I gotta get going. I have my daily report to do. See you around Midoriya!"

With a friendly wave goodbye, Tetsutetsu left the gym room. All by himself, Izuku was about to get ready to leave when suddenly Artemis spoke up.

"Are you already leaving Harbinger?" The ethereal voice asked curiously.

A little confused as to why Artemis would ask that question, Izuku nodded tiredly. "Umm...yeah I am. I am sore all over and tired." He said truthfully.

"Ah, I forgot you are still acclimating to your new abilities." Artemis said absentmindedly. "Forget your preconceived notions about the limits of your body, for you are the Harbinger! If you are feeling tired, just use your energy to revitalize yourself!"

Izuku looked down at his hands in confusion. "You mean I can just...recharge myself? Just like that?"

"Precisely!" Artemis explained. "You are no longer bound by the normal rules of your human body. In reality, the energy granted to you can keep you going without pause for weeks! You don't need to eat or drink, you don't need to sleep, and if you receive a minor injury you can just heal it yourself."

Shocked and speechless, Izuku took a minute to process all the information Artemis had just dumped on him. "W-what?! Really?! But I still feel tired and hungry?"

Artemis sighed in exasperation. "That is because you are not actively using your powers. To achieve your true potential, you will be using your powers at all times, even subconsciously while you sleep. Just think of this as the first part of your training, focus on keeping your power activated but at an even level while you exercise."

Nodding uncertainly, Izuku closed his eyes and focused on activating his power. A few seconds later, Izuku felt a tingle run through his body. Opening his eyes, Izuku was amazed to feel that all of his soreness and exhaustion had disappeared. Honestly, it felt like he had just chugged three energy drinks. His body felt light as a feather, and it was like his muscles were screaming to be used.

"Wow!" Izuku said in awe as he flexed his fingers. "This feels...amazing!"

"Now we continue your training!" Artemis said happily. "Get back to work young Harbinger!"

An excited grin on his face, Izuku immediately got back to work. Starting off with some push-ups, Izuku was amazed to find that he could apparently repeat the exercise endlessly. After a few thousand push-ups, Izuku got bored and decided to move onto sit-ups. His mind focused and determined, Izuku fell into an almost trance-like state as he exercised. After doing a couple thousand reps each of some basic exercises, Izuku moved onto the machines. First he started with a twenty kilometer run on a treadmill, followed by a few thousand reps on a rowing machine, then a couple thousand reps on the leg curl machine. Endlessly repeating the loop of exercises, Izuku looked down at his wristpad to see that eight hours had passed! Without even a drop of sweat on his body, Izuku finally stopped exercising.

"Perfect!" Artemis said happily. "Now just repeat that process every day!"

Laughing softly at the sheer absurdity of what he had just done, Izuku stepped out of the gym room and walked to his room. Once back in the privacy of his room, Izuku tried to go to sleep.

Only to realize that he was still perfectly awake.

"Uhh...Artemis?" Izuku said softly as he laid in his bed and stared at the ceiling. "Is there any way I can sleep like this?"

Artemis was quiet for a second before responding. "Technically...no. However, I might have an idea that could simulate the effects of sleeping if you need to pass the time. Think of it sort of like meditating. If you purposefully alter your consciousness with your power you should be able to simulate the feeling of sleeping without all the unnecessary side-effects."

Izuku frowned in confusion. "So like...could I use my powers to set a mental alarm and wake-up that way? I don't want to accidentally try to sleep and end up hibernating for a couple of years."

"An excellent idea Harbinger!" Artemis said proudly. "Why don't you try sleeping for an hour and see what it feels like?"

Grunting in understanding, Izuku shifted around in his bed until he was comfortable and then closed his eyes. It was strange using his powers with his eyes closed, but Izuku found that the more he focused the easier it was to manipulate the energy inside him. Setting a mental alarm for one hour, Izuku tried to figure out a way to force himself to sleep. After what felt like five minutes of fruitless thinking, Izuku sighed in annoyance and opened his eyes.

"Sorry Artemis, I don't think I can do it." Izuku said disappointedly as he sat up.

"What are you talking about Harbinger?" Artemis said in confusion. "Precisely one hour has passed since you closed your eyes."

Looking down at his wrispad in confusion, Izuku was shocked to see that Artemis was telling the truth.

"B-b-but...it felt like I just closed my eyes for a second!" Izuku said in disbelief. "How does that even work?!"

Artemis chuckled. "The power of the Creators is vast and unknowable." They said sagely. "Now you have a convenient way to pass the time if needed."

Izuku could not help but laugh. "Man, I wish I had these powers back in school! I would have had so much more time for studying!"

Artemis chuckled as well. "Well now that you have unlocked the capabilities of your own mind, I suggest we continue your training."

Nodding excitedly, Izuku laid back down and closed his eyes. "Sounds like a plan!"